Are you on the #bitcoin-otc Web of Trust (WoT)?

Then please use the proper description. If your account history doesn't show a BTC deposit then that's a different problem than what you had originally reported (as a "hacked" account would require the deposit to first be credited to your account before it could be withdrawn).

Either way, the solution will come from contacting BITSTAMP support.

I'ld be curious if Bitcoin to Cash will send Western Union.    You can place an inquiry here:
 - https://www.bitcoin-to-cash.com/order.html

A priority mail envelope costs somewhere in the range of $5.  Find a trusted trader willing to trade with you, for cash, and send the money via USPS.   

The #Bitcoin-otc Web of Trust (WoT) can be used to get the trust history of some traders who will do this.  I have also seen individuals on the forum offering to do this type of exchange.  Casascius is one.  Also:

Actually the tone from them was less hostile than previous mentions of Bitcoin there. At least that's what it seemed from my glancing over.

I'm not sure what you are saying, but BitSTAMP is a market exchange.  Without knowing your knowledge of how market exchanges work, forgive me if you are already aware of this.  

To buy 4 BTC immediately on a market exchange you need to enter the order (bid) with a price not necessarily at the lowest ask price but at a price high enough that all 4 BTC you want to buy are listed at.

For instance, if the order book (ASK) looks like:

  QTY   AMOUNT
  0.5         $31.00
  1.0         $31.50
  2.0         $32.00
  2.0         $33.00
  2.0         $34.00
  
then to get 4.0 BTC immediately you need to enter the order as 4.0 BTC with a price (bid) of at least $33.00.
If you were to place an order for 4.0 BTC at a lesser amount, like $31, the order would only get "filled" with 0.5 BTC -- as only 0.5 BTC are available for sale at that price.   If you leave the partially filled order there, eventually it might get filled if other sellers place sell orders at that level.

You can't "undo" but you can create a competing transaction and try to get that mined first.

Most nodes will not relay a double spend so you'ld need to somehow get the transaction sent directly to a miner who would include that double spend instead of the original transaction.

But even then it becomes a race.  If the transaction has a good chance of being mined in the next couple of blocks your miner partner would need tens of TH/s of mining capacity to have a 50% chance or more of being able to mine the double spend.  That gets very expensive to do.  :-)

Bitcoins In Berlin (not just for Berliners anymore) and ECurrencyZone are two:
 - http://en.bitcoin.it/wiki/Selling_bitcoins

Did you mean to say you weren't or that you still aren't?

Because unless you can say with certainty that you aren't using a machine that has been compromised, then even after changing your password your remaining coins are no safer now than before.   Get 2FA.  If you don't have a smartphone or other second device that can run it then move the funds to an EWallet that uses SMS-based 2FA.

It sure does ...

MtGox account got cleared out
 - http://bitcointalk.org/index.php?topic=85533.0

All BTC disappeared from my Mt. Gox account
 - http://bitcointalk.org/index.php?topic=88368.0

Another:
 - http://bitcointalk.org/index.php?topic=80562.msg941759#msg941759

And another: My mtgox account got compromised, what can I do?
 - http://bitcointalk.org/index.php?topic=84585.0

Yet more: MT.Gox account hacked - lost 2k USD - MT.GOX will not explain how.
 - http://bitcointalk.org/index.php?topic=89142.0

And more again: Bitcoins stolen from MtGox
 - http://www.reddit.com/r/Bitcoin/comments/x8lcv/bitcoins_stolen_from_mtgox

And yet more: Stolen from Mt.Gox coins. Help return the coins.
 - http://bitcointalk.org/index.php?topic=119816.0

Or more here: Email from Mt.Gox this morning.
 - http://www.reddit.com/r/Bitcoin/comments/z0na5/email_from_mtgox_this_morning

And even more here: I just had $715 stolen out of my Mt. Gox account.
 - http://www.reddit.com/r/Bitcoin/comments/12j9gi/i_just_had_715_stolen_out_of_my_mt_gox_account

And the biggie: Bitcoinica MtGox account compromised
 - http://bitcointalk.org/index.php?topic=93074.0

With more here: Unauthorized Account Activity on my Mt.Gox Account - Account Compromised/Hacked?
 - http://bitcointalk.org/index.php?topic=94140.0

And even more: *MY* Mt Gox Account was Hacked - lost it all today... now what!?
 - http://bitcointalk.org/index.php?topic=137795.0

Ditto: My MtGox account was just exploited - 3 BTC stolen
 - http://bitcointalk.org/index.php?topic=141816.0

Ditto on the ditto: Just lost 190 bitcoins through Mt. Gox
 - http://bitcointalk.org/index.php?topic=141831.0

And now this one gets added to the list: Unauthorized withdrawal on Mt. Gox
 - http://bitcointalk.org/index.php?topic=147070.0

And on other services as well. Here same thing happened to some GLBSE users:
 - http://bitcointalk.org/index.php?topic=84893.0

And elsewhere, BitMarket.eu in this instance:
 - http://bitcointalk.org/index.php?topic=5441.msg1259168#msg1259168

And now on bitcoin.de as well: Bitcoins stolen from bitcoin.de.
 - http://bitcointalk.org/index.php?topic=130264.0

In none of these was the person using multi-factor authentication. Mt. Gox has had Yubikey support for a while. Mt. Gox accounts now support Google Authenticator:
 - https://mtgox.com/press_release_20120605.html

If the exchange you are storing funds with doesn't provide OTP, consider using a different exchange:
 - http://bitcoin.stackexchange.com/questions/4113/which-two-factor-authentication-methods-are-available-at-which-exchanges

If you are storing funds in an EWallet, consider using a paper wallet.

Also, here is a fantastic guide: How to use 2-factor auth on mtgox, even without a smartphone (from a second device, of course, not from the same computer you log in on).
 - http://bitcointalk.org/index.php?topic=111943.0

I don't see that transaction on Blockchain.info so either the transaction is an invalid transaction or it simply hasn't been broadcast yet.  The client doesn't give an easy way to tell which of those two it is, but if you leave the client running for about a half hour or so it will re-broadcast any transactions made that haven't yet gotten a confirmation.

Of course, if your blockchain hasn't synced then the balance shown won't necessarily be correct.  It is pretty difficult to create an invalid transaction yourself [Edit: with the Bitcoin-Qt client] unless maybe you are running the client in two separate places and spend from both without the blockchain having gotten synced first.

The bitcoins held by BITSTAMP are in a hosted (shared) EWallet right?

So you can't look at the blockchain to check your BITSTAMP account balance.  With a hosted (shared) EWallet, that Bitcoin address is tied to your account so the wallet provider knows of your bitcoin deposits.  But what happens from there at the blockchain level is no longer tied to your account.

On ICBit.se are BTC/USD futures contracts, with up to about 10X margin.   On MPOE are CALL and PUT options contracts, which give leverage and buying on margin can be requested.   A service called BitFinex is derived from Bitcoinica source code.  1Broker provides leverage.

 - http://en.bitcoin.it/wiki/Trade#Financial

[Edit: Don't discount the counterparty risk however.  Do your research.]

There's also other approaches:

pybtcsplit - m-of-n Private Key Splitting made easy in one simple python utility
 - http://bitcointalk.org/index.php?topic=104086.0

2-of-3 Paper Wallets
 - http://bitcointalk.org/index.php?topic=139625.msg1553640#msg1553640

casascius / Bitcoin-Address-Utility
 - https://github.com/casascius/Bitcoin-Address-Utility

Probably means over the last week, versus each prior week since early-January.



 - http://bitcoincharts.com/charts/mtgoxUSD#rg10zig12-hourzczsg2013-02-21zeg2013-02-26ztgOzm1g10zm2g25


Relative to the chart starting from early January:



 - http://bitcoincharts.com/charts/mtgoxUSD#rg10zigDailyzczsg2013-01-10zeg2013-02-26ztgOzm1g10zm2g25

Here's relevant reading:

How-to Multi signature transactions
- http://bitcointalk.org/index.php?topic=82213.msg906833#msg906833

Just to clarify, with the Bitcoin.org client you don't have "an address", you have a wallet that contains many addresses.  Each time you click Receive money a new address is generated.  So just seeing a new address doesn't mean anything

Also, installing the client again doesn't overwrite or replace an existing wallet.dat

The wallet.dat contains the private key for each address in the wallet.  Without those private keys, you can't spend the funds.   


You can click on the Transactions tab to see all activity that occurred.  If it shows no activity at all, then for whatever reason it is currently an empty wallet.

Also, until the blockchain sync has completed, your balance shown by the client may not show properly.

 - http://en.wikipedia.org/wiki/Snowball_effect

Here's the article on that:
 - http://www.news.com.au/money/banking/cash-grab-inactive-bank-accounts-to-be-seized/story-e6frfmcr-1226585867131

IRAs have this problem in the U.S. now:
 - http://online.wsj.com/article/SB10001424052702303754904577531142227149470.html

And BitMe.com allows cash deposits to be made at any Chase bank branch:
 - http://www.BitMe.com