To extrapolate on illiilii's post:
Rast and a few others are possible, plus carry overs from other teams.
Expect JB to run this team with a new PT license, and the team to be stacked with more riders. Lance won't ride for a team that isn't the, or nearly the, biggest funded most powerful team. He hasn't since about 1999, maybe.
Fernando Alonso's squad:
Contador (unless he goes to Caisse, and he might if Valverde is done, and Pereiro retires).
Others, of course.
A slew of other Kazaks, and a few others too.
Zubelida and Klöden are likely to end up elsewhere, though Zub could end up here. Klodi may be in no man's land after the Tour.
The problem the Astana team is going to have is that the ASO is going to push hard to keep Vino and Kashi out of the Tour because of the UCI's 4-year rule against riding for a PT team. I don't think the UCI will uphold it though, and will likely cave. Expect lawsuits.
Floyd Landis will be riding for Ouch/Maxxis in 2010. Same as now. He can't ride for a PT team until his 4 years is up under the phantom UCI rule (see Vino and Kashi above). However, this rule didn't apply to Basso, DiLuca, etc. So if he can get in with the right group (like Lance/JB's team) the UCI would likely look the other way, though the ASO won't let him race in the Tour, or many of their other races.
Floyd is going to be a real question mark. He rode okay in the ToC, then mediocre in March, April, May and into June he looked better recently, mostly as a very good decoy for Sutherland, helping the team results. At some point Floyd is going to either step up and show some of his old form, or he's going to be stuck there in a funk. Though he could have huge dividends from his Ouch teammates coming - when he's ready to try to win, I'm sure they'll throw everything behind him. Curious how he races at the Pro and ToM coming up.