BitcoinBuilder Last Trade Price: 0.50005 ฿ (Gox/Bitstamp: 0.446)
I have never seen it this close, it was trading at about a 50% premium in the past few days. Not sure what's up.
Fiat money entering Gox to arbitrage between BB and GOX.
On the weekend?
I think that is possible, yeah. Via OKPay. Or it may be that bank transfers (to Gox's bank account) were completed on Friday but Gox only processed them (crediting people's accounts) on Saturday.