I agree, bet on bet looks good, but it isn't a Flash site, their software was made with java. Also, i think it's not original, you can see the same software and the same graphics in
www.holdempoker.com, so i think bet on bet doesn't have something new to offer.
I've tried
Pitbull Poker, and I think this is a good site. It's a new poker room, so they will have to improve their software in the next months. I like the graphics, i think they are more realistic than other sites, that just show avatars, or empty chairs, etc. They don't have a lot of players, but i'm sure when they will announce their tournaments, people is going to play there. Freerolls are very interesting for poker players. Also, to play poker using flash is good idea, because you don't have to install the software and if you are in the school, or another place where you are not allowed to install programs, you can play poker. I like
Pitbull Poker, and I hope it will be better soon.