Just noticed what looks like automated buying and selling:
The bot is buying 0.01 every transaction
Surely this would just lead to being eaten away by the commission...
unless...
the bot is run by mtgox = no commission
or perhaps
it is the bitcoinica bot and can afford to do it because the spread there is wider than the commission.
ZOMG! Conspiracy!
Oh, wait. 5.01901 * 1.0025 * 1.0025 = 5.044136, and these were at 5.04643, for a miniscule profit, after fees.