Of course not.  As stated in my original post - if that policy had been advertised at the time of my last deposit I wouldn't have made it.  Thanks to the folks on this thread for the suggestions on alternate exchanges.

What a joker you are.  So if I am the person who owns the account, then they will reverse the transaction?

But if I was not the person who owned the Dwolla account, but rather if I transferred the money from someone else's Dwolla account... then they will keep it and not return it?

Get over yourself, they should reverse the transaction immediately.

So they are entitled to keep the $100?  What would you describe that as?  Profit?  They certainly provided no service.  I agree that any exchange, MtGox or the alternatives, are free to create whatever policies they like, however stealing user money under a pretense is deplorable.  If stating that fact sounds like 'whining' to you than I would question your neutrality in the matter.

I'm sorry I should have clarified the problem.

My problem is that MtGox will not reverse the transaction to Dwolla.  If they don't want to do business with me that's perfectly acceptable and their right, but to hold $100 dollars in some black hole unless I provide them with further information -- and to refuse to simply return the money to Dwolla where it came from, that is unacceptable.

The fact that a company would take that stance is proof enough that they can't be trusted with personal information.  Honest companies don't act in that way.

***
UPDATE:  As of 6/10 it seems MtGox has recognized how unsustainable its position was and backed down.  The money was finally deposited and was converted to BTC and withdrawn with no further verification and it seems this has happened for others in this situation as well.  Let's hope this is the start of a more responsive and customer-respecting MtGox.
***

Hello,

I just signed up to pass on a warning.

I'm a rather new BitCoin user who wanted to play around at SealsWithClubs (BTC poker).  In order to get some Bitcoins I set up Dwolla and MtGox accounts.  Over two months I made a handful of transactions of $100 from my bank->Dwolla->MtGox->BTC.

Everything worked smoothly up until a few days ago when I went to transfer another $100 into MtGox via Dwolla.  I waited and waited, but MtGox never posted the USD that was received from Dwolla into my MtGox account.  I went to MtGox support and they said they would not honor the deposit without further action by me since sometime after I initiated that transaction MtGox updated their terms to require all Dwolla deposits to go through an identity verification process.

I am fully verified by Dwolla to the point they have my SS# -- but I have no particular interest in providing MtGox with any further identifying information.  If that had been a standing requirement at the time of my transfer in, I simply wouldn't have transferred.  As such, I asked MtGox to kindly return the money that was in limbo to my Dwolla account since they would not post it to their system.

MtGox refuses to return the money to Dwolla, but continues to refuse to post it internally.  Meanwhile, Dwolla itself refuses to allow disputes on transactions that involve virtual currency...

...hence, MtGox has effectively stolen $100 from me by 'disappearing' it forever.

Given the rather small amount at stake, I can get on with my life, but I wanted to post a fair warning for anyone else.  Other deposit methods may not face the same problem at MtGox, but I would recommend caution dealing with any company which prefers to steal $100 on a pretense than simply return it to where it came from.