From an AP story, via Politico:
Mike Huckabee appeared headed to a convincing victory among Republicans, while Democrats Hillary Rodham Clinton and Barack Obama appeared to be in a head-to-head battle for victory, as Iowans began to render the first true judgments of the 2008 presidential cycle Thursday night.
John Edwards lagged in a survey of voters entering the caucuses by The Associated Press and the television networks.
In 1,781 precincts across the frigid face of Iowa, Republicans and Democrats started meeting at 8 p.m. Eastern time to begin winnowing tightly bunched fields in both parties and start setting the contours of what is likely to be an unparalleled nomination sprint.
Only fragmentary results were immediately available. Turnout appeared to be extremely high, according to initial reports. About 120,000 to 150,000 people were expected to come to the Democratic caucuses and 80,000 to 90,000 to the GOP meetings.
In preliminary results from interviews of voters entering their caucuses conducted by AP, more than half of all the Republicans said they were either born-again or evangelical Christians, and they liked Huckabee more than any of his rivals. Romney led handily among the balance of the Iowa Republican voters.