During the December holidays of 2009, I sent $100 to Poker Stars. They were having some freebie tournaments for bloggers -- sounded good to me. Even though it's a great poker operation, I never really played there much.
Today, I got my cash-out check from them. My $100 has grown to $118, a very nice 18% return on my money -- I'm rich!
I have a similar amount on Full Tilt and Ultimate Bet. I'm optimistic about FT, but UB not so much.