We shouldn't forget possible pickups in New Mexico, Virginia, and a couple of the EVs in Nebraska. Some more states that would at least be competitive include Texas (!), Louisiana, and (maybe) one or both of the Dakotas.
Ohio is 20 EVs. A candidate could offset a loss in Ohio by winning, for example, New Mexico, Virginia, and two electoral votes in Nebraska.
Also see below i think VA will be a really hard state for both BO and HRC. It is still redish and southern VA is really conservative. It also has a really big number of military voters and McCain is going to get them big time. As i say below BO has to win all of gores states plus NH and then either NV or CO. My guess is CO is his best chance. But he is going to have to tone down gun control, afirmative action, and gay marrage or McCain will slowly pull ahead there. If is a very libertian state so Gun and Gays are still important but much less into the God vote.
david