(Unless, of course, Ruffian is somehow working on the Crackdown sequel while Realtime finishes up APB, in which case Thomson will totally also work on it. But the rest of the original team won't.)
The entire studio's collective resume is pretty impressive, actually, peppered as it is with other names like Fable, PGR, Mortal Kombat, and Grand Theft Auto. (Perhaps you've heard of them.)
As for what the company is doing now, their official site has this quote.
All we can say about our current project is it's signed with one of the world's biggest and most successful publishers and on a great project we're really excited about.
Sounds promising. Make a great game, y'all. Hit up the Ruffian site for more info on the other people currently aboard, as well as quite a few job openings.