If Gingrich is the nominee, I could easily see enough seats shifting in New Hampshire for Democrats to retake control. Also, dont count out a shift in the Michigan House, where there have been some wild swings in the past. The Wisconsin Senate map actually isnt that bad for Democrats. If they win control in the early 2012 recalls, they will probably keep it. It mostly shored up GOP incumbents like Alberta Darling. Dems will probably gain seats in the Wisconsin House, but not control.
You know that the Republicans have a 3/4ths majority in NH, right? It is NH, but that still takes one heck of a wave to overcome.
Democrats had a two thirds majority and that didnt save them in 2010.