Guys the joke on us, I've been watching Mtgox and bitstamp and simply some smart people are slowly buying small batches of 20-50 BTC each hour and it has been happening for the last couple of day.
It is actually the same bullshit Gox bot that was identified a couple weeks ago. At least on Gox. People call it the "Willy" bot and is likely run by MtGox since it had trading access while everyone else was shut out of Gox for an hour+ last week. Most of this current rise on Gox is the Willy bot. Buys around 15btc every 7-10 minutes.