Here's a pretty strong rebuttal to Nate Silver's predictions by electoral-vote.com.

[craigmatic]

Statistician Nate Silver has built a statistical model of the 435 House races and by running simulations with the model, has determined that the Republicans have a 2-in-3 chance of getting a majority in the House. For people not familiar with stochastic modeling, a lot depends on the details of the model. Silver has included every parameter and bit of data he could get a hold of, which is generally a good thing, but the devil is in the details. For example, current polling shows that when asked: "Will you vote for the Democrat or the Republican?" (without naming the specific local candidates), the GOP is up by 8%. Such a factor can be included in the model. The hard part is figuring out how heavy to weigh it.
http://www.electoral-vote.com/

At least there's some hope. I didn't think the repubs could take the house. They'd need to run the table and not lose a seat but they'll fall a handful short.