UltimateBet:: The Good, The Bad, and The Ugly

[BatsShadow]

This doesn't exactly answer the OP's question, but UB is the only site where I actually noticed playing against a bot. I was playing some micro stakes like 5cent/10cent limit and I played against a very agressive player who always folded when raised. It was very mysterious behavior. On the whole, I thought the table was extra agressive for such low stakes, but when I noticed this guy, I just started calling preflop and auto-raising his flop bet.