The AFP has a story that caught me completely off guard.
It appears that John McCain is considering a run for the Presidency.
It also appears that Russ Feingold has no intention of running, which I'm not sure anybody really thought was going to happen anyway.
To sum it up, those who have declared, or coyly non-declared, but winked, for the race so far are:
People are fully expecting Rudy Giuliani to run, although he doesn't appear to be putting any infrastructure in place quite yet. He is perhaps the only candidate that could get away with this. It should be interesting either way.