This year's USBB is going to have some of the most popular contestants from all the seasons, as voted in by the US public. Which means Kaysar, Howie and Janelle will hopefully be back.
I think USBB is a very different breed of fish from UKBB. It suffers from the lack of audience interaction, but certain rules like the contestants being allowed to discuss nominations really help the show. It's a much more tactical show than UKBB. If you liked watching Nick skulk about the house and be confronted by Craig and company in the first UK Big Brother, USBB is the show for you. Over here it's all about trying to wring some kind of stardom out of the experience, whereas over here it's all about winning the game.