Yes, it's difficult, but blockexplorer.com is a life-saver.  We have even won PayPal disputes for our Mining Rental Contracts, where there is no physical item shipped, in part because blockexplorer.com was able to identify the transfers.

That may be their opinion. But how many of them run an actual business? We do. And we win chargebacks. So from experience I can say that a signed proof of delivery goes a long way to fighting a chargeback.

With signed proof of delivery to the credit card billing address there is a good chance of successfully fighting a chargeback.

Very low stales. Excellent pool!

Wow, SolidCoins process themselves? No miners needed? Sign me up!

This "new algorithm" is nothing more than difficulty adjustments every 240 blocks instead of 2016 blocks. A good change for an infant currency with wild swings in hashing power. Insignificant for an established currency like Bitcoin.

LOL. I think that due to the lengths he went to keep his identity hidden (TOR, anon email, etc), that he didn't use his real name. Of all the people in the world that might be Satoshi, someone actually named Satoshi wouldn't be him.

As soon as all the air gets out of the tubes, then the pump is nearly silent. It's probably about as loud as a modern laptop hard drive spinning.

That will depend on your radiator, fans, and pump. 6 GPUs in a single loop is a lot of heat to dissipate. We use a big radiator with lots of fans and a high speed pump. The pump will move the water around the entire loop in about 3 seconds flat, so the temp increase from gpu to gpu is minimal.

Temps run about ambiant+40c, so typically 65c in our office.

• 3/8" ID UV sensitive red tubing, add a black light for bling
• Danger Den pump, 237 GPH, really moves a lot of water
• Black Ice GT Stealth 360 Radiator, triple 120mm fans pushing, dual 200mm fans pulling, these move a ton of air, quietly

Self-contained water-cooled triple 6990. Cool and quiet with nothing sticking outside the case:

The banking system has determined that combating fraud is hard, so they just don't bother fighting it. Chargebacks are everywhere.

http://en.wikipedia.org/wiki/Automated_Clearing_House

Current difficulty: http://blockexplorer.com/q/getdifficulty
Estimate for next difficulty: http://blockexplorer.com/q/estimate

Let me guess, you've never run a business before. Well I do. I trust bitcoins 1440 times more than I trust credit cards, even 0/unconfirmed transactions. Any credit card transaction can be easily reversed up to 60 days later. A bitcoin transfer is nearly impossible to revoke 1 hr after receiving it.

The solution is simple, and it's already in place with credit cards. Haven't you been asked to show ID when using a credit card? Solution: Accept 0/unconfirmed transactions with a valid ID.

This isn't just rhetoric, I'm backing my words up with a real commitment, with real money and products on the line. You can walk into my store and buy a top-of-the-line computer and I'll let you walk out the door with it after seeing a 0/unconfirmed transaction on my bitcoin node and showing a valid ID. A credit card transaction is far more risky to me.

Credit cards are the biggest fraud of the century.

Here's just one of many examples:

http://www.zug.com/pranks/credit/

Ok, so what you're saying is you are considering implementing what they call Authorize and Capture? If we can Auth when the order is placed, and then Capture when we ship and there's then no chargebacks after that, then we're golden! That's a very good layer to add to Bitcoins.

Beyond that, we'd like to be able to refund the customer (at our discretion of course), so add a way we can send the Bitcoins back to whomever sent it.

As an online merchant, two things happen. A. We get paid, and B. We ship the product. Once we ship a product, we have virtually no way of getting it back. Chargebacks kill us because they are one-sided. Don't add them unless you can guarantee that we'll get back the product we already shipped.

Not only do they push the liability onto the merchant, but they offer essentially ZERO security to help the merchant protect against fraud.

You're welcome to stand by your opinion all you want, but it isn't supported by facts.

The facts are: our Professional Rig includes 3x 6990s running at stock performance and is adequately cooled in a conventional closed case.

It's a fact that 340 Mhps per core is just fine for a 6990 as shipped by the OEMs. If you want to remove the warning sticker and apply the overclocking settings, that's your business, not ours. We never claimed to be selling overclockable systems.

Here, let me link you the product page again.

http://www.bitcoinrigs.com/products/Professional-Rig-2000.html

Let me know which claim is misleading. Where have I been unclear?