Nancy is not going to have an exactly easy time of it. Several of the high-profile "Democrats" are simply anti-Iraq conservatives. "DINO's" in the purest sense of the word. Some of them make Zell Miller look like a lefty&
IMO, Having Nancy as the face of the Democrats for the next two years is going to be a liability with mainstream America. Her status as the left-MSM's media darling/savior is going to backfire somewhat.
IF, and it's admittedly a big "IF", the Republicans take the proper lessons from this and "run like '94" in '08, the Democrats will only enjoy a two or four year run, and those new conservative members will multiply Republican gains.
America had a "breakup" with the Republicans on Tuesday, but all the Democrats managed to do was get themselves a date as the "rebound guy". That's a shakey foundation for maintaining control for much longer than 1-2 election cycles IMO.
It's far from a sure thing, but I think this may all add up to the Democrats "winning the battle, but losing the war", whereas the Republicans "lost the battle, but MAY win the war." in the long haul. If this had to happen, I'd rather it happen now, than in '08. Also, I wasn't aware of this when I made my predictions that the Republicans would hang on with the skin of their teeth, but apparently for them to have held on when the seated president of the same party was in his second term would have bucked over 100 years of electoral history...
Factors that play to the Republicans advantage, the demographic shifts (Compound "negative interest" from abortion in voting cohorts, and conservative families trending larger than liberal), districting, fundraising, and slow decline of the left-MSM are all still out there.