Bitstamp is actually several dollars above Gox and has been for a few hours. Color me surprised to say the least.
Already said it a couple of days ago:
Gox leads in volume
Bitstamp leads in price
I have seen huge volumes on bitstamp recently, I guess ex goxxers looking for shelter.
A week ago it was cheaper in general, indeed I always found it cheaper till today. But yes, larger volumes showing up which convinced me to move over.