Pardon the double-post, but the FIA has re-opened the selection process. They're only considering the seven reserve teams; so far, Epsilon Euskadi and Prodrive are the only real contenders for sheer virtue of the fact that they're the only ones who have said anything about it. That said, Peter Sauber is trying to save the team that bears his name.
Unfortunately, I don't have a link. It's 4:45 in the morning and I'm hungover. You'll just have to take my word for it; when have I ever led you astray?