There is a web site called intrade.com that predicts the outcomes of things - including elections. It has a very good track record. Intrade currently had the probability of a republican win at 57% and a democrat win at 45%. Weather reports also predict bad weather for the Tuesday elections which may also suppress democrat turnout.

Intrade also predicts a 67% probability of the republicans taking control of congress in the 2010 mid-term elections.

This is the hope and change I can believe in.