I think there's a good chance that the Dems can take back at least one House of Congress ... starting with this upcoming election, even and there's no telling about the White House ... it depends who the candidate will be, and that's way too far off to tell at this point.
The Republicans will probably lose a whole lot ... seats, voter confidence, etc., not because the Dems are better or smarter or have a better plan, but just because of the mass confusion of the Repub party right now. They are shooting their own selves in the foot!

However, I don't put it past them to come up with some sudden amazing plan to convince the American people that they are still the best choice ... the Dems don't have enough sense to go for the juggular while the getting is good!

If they could get enough press time in (and the intelligence) to say how stupid people were for voting in this Republican Administration and president in the first place ... I think we'd see a 180 in the government, in '06 and in '08.