Georgia: Saxby Chambliss (R) leads Jim Martin (D) 50-46. However, the Atlanta Journal-Constitution reports that over 600,000 early votes have not been counted. Martin led handily in early voting, so it's highly likely that Chambliss will end up below 50% and this will go to a runoff.
Yeah, and in the presidential race, McCain leads President-elect Obama by just over 200,000 votes. That means that it's possible that the president-elect could still win Georgia. Obama only needs a third two-thirds of the early vote count.
The caveat being that these stories always happen after an election, and I can't really verify the extent of the early vote situation.
CORRECTION: Meant to write two-thirds above.