Daily Kos is conducting the last of these for 2005, so go cast a vote here.
The Kossacks have consistently picked Wesley Clark as their favorite, with Russ Feingold and John Edwards running second and third. The MSM's presumptive front-runner, Hillary Clinton, barely leads the rest of the pack, which includes Senators Kerry and Biden, Governors Warner and Richardson, and a few lesser lights.
So far the order for November holds true to form: Clark, Feingold, Warner (who is obviously getting a bounce from the November 8 results in Virginia) and Edwards.
Update (11/22): The results are in.