Btw, the ask prices are ridiculously optimistic, right now realxbt is worth more than twice the price of goxxbt, but those people still ask like 80% of the bitstamp price for their goxxbt lol.
Well, I guess it's their gamble.
If Gox really lifts the BTC transfers on Monday, that will -within seconds make these goxcoin into real BTC and a bit more (10%?). So about 30% within a few minutes is not too bad.
At any rate, I'm sure people are either hedging or don't mind taking the risk.
But if bitcointbuilder.com turns out to be an scam... well, everyone looses.