Just got this email, twice. Looks like someone is spamming the compromised Mt Gox user emails already, trying to get them to sign up at Tradehill. Stupid thing is, they're using their referral ID to try to make a coin or two off this. Disgusting. Tradehill should freeze/delete this referral account. It makes Tradehill look bad, and BTC exchanges don't need any more bad publicity right now.