I doubt I'll be awake when the final result comes in, but as I type this, Paul Hackett is winning by a 23,957 to 22,846 margin. That's with 305 precincts of 753 reporting. Apparently, turnout is double the projection - 100,000 is likely instead of 50,000.
You can follow the score here and here. For reference tomorrow, when it's time to talk about What It All Means, I refer you to Charlie Cook's analysis from before the race, and Jerome Armstrong's interpretation of Cook's numbers.
UPDATE: Final results are in:
US HOUSE Ohio 2nd Dist
753 precincts of 753 reporting
JEAN SCHMIDT 57,974 52%
PAUL HACKETT 54,401 48%
Bottom line: Schmidt, the Republican, is still favored to win the election, but don't rule out the possibility of an upset, given the vagaries of August special election voter turnout and the problems unique to Ohio this year. But even assuming a GOP win tonight, the margin of victory can give us some insight into just how radioactive the governor's troubles and the "time for a change" sentiment in the state will be for other Republicans in the Buckeye State next year. If Schmidt's victory margin is in double digits, this tells us that there is not much of an anti-GOP wind in Ohio right now. If the margin is say six to nine points for Schmidt, then there is a wind, but certainly no hurricane. A Schmidt win of less than five points should be a very serious warning sign for Ohio Republicans that something is very, very wrong, while a Hackett victory would be a devastating blow to the Ohio GOP.
Special elections in 1993 and early 1994, for example, gave us a sneak preview of the storm clouds Democrats were headed for down the road.
In Kentucky's 2nd District, Republican Ron Lewis easily won a special election in May of 1994 to replace longtime popular Democrat Bill Natcher -- an early sign of the beating Democrats were going to take that November in southern districts across the country.
In Wisconsin, a special election in May of 1993 to replace popular Democratic Rep. Les Aspin -- who had been tapped by President Clinton to serve as secretary of Defense -- proved to be a political canary-in-a-coal-mine as well. Democrat Peter Barca beat Republican Mark Neumann by just 675 votes in a district that Aspin had easily carried for 23 years. Just a few months earlier, Aspin had crushed Neumann with 58 percent of the vote. In 1994, Neumann beat Barca by 1,120 votes.