Correct me if I'm wrong, but isn't it impossible to withdraw USD from MtGox at this point? How can this be a viable source of BTC->USD comparison when the only thing you can do with a USD balance on MtG is buy?
I'd like to buy a pro copy of google sketch-up, and buy some lumber at this lumberyard that is cash only.
How do I do it if i can't withdraw usd?
Once you've done this once, everything will go a lot faster next time.
Don't bother with mtgox, there's a reason why there's such a price discrepancy and we all use Bitstamp as the real exchange rate.
EDIT: I just read elsewhere that mtgox is still highly liquid if you're in Japan or China, which means that there may be a good reason for the price discrepancy (high demand in China). But don't bother with gox if you're in the U.S.
Yes, I own an info domain. Because I liked it and it was cheap. That's it.
However - it's much easier to withdraw in Japanese and Chinese currencies. BTCChina is pretty close to GoxUSD.