I would highly recommend avoiding any online wallet, why add the risk? I mean really, i am sorry tradehill is a good company and i respect them. Yet, i personally would feel better if my money was in my own vault that i know i secured.
i.e. Keep wallet on a separate computer from miners, and everyday use. You should use a browser who doesn't store cookies and such. After all we are indeed dealing with legitimate money, we should take the same precautions that we do with our online banking if not more.
