We now have a 16-17 USD diff between stamp and gox. It seems that the "1 BTC several times a minute"-arbitrageur has used all his steam for the time beeing. Awaiting more arbitrage as soon as fiat (deposits) have moved from gox to stamp.

This arbitrage, and more to other exchanges, should provide some damping to the dump/panic buy movements on gox. Maybe the next bubble (entrepreneurs having temporarily too much faith in bitcoins rapid world takeover) will be a tad more leant back.