Well, Bush is going to have a BAD couple of years and it couldn't happen to a more deserving man. Not only did the Dems pick up the 15 seats they needed to take the house and thus the purse strings AND investigation power (finally), at the last count there up to almost 30 seats with 13 still undecided, and most of those leaning Dem. That is HUGE.
Additionally, they are two recounts away from taking the Senate as well and lead in both races. That is even crazier because while the House was pick-up was pretty much expected the Senate seemed pretty unlikely. Yanking boths chambers is pretty much going to shut down the Neocon experiment that has been driving the country into the ground.
The makeup of the takeover is going to be very healthy for the country. What ended up happening is a lot of the crazies that hijacked the Repubs (i.e., the religious right and neocons) were kicked out on their butts and moderate dems came in...several of whom were traditional repubs that switched parties because of how far right the repubs swung since '94. So what you end up with is a more moderate congress. Maybe finally we will get some sanity back into policy
The only downer was that Liberman won...that dudes an ass. While he is probably going to cause problems he can be mitigated as long as the dems control the dialog. The issue with that guy is he kept kissing the neocon's ass and provided 'bi-partisan' support for some of the more screwy legislation such as the torture bill and such. With the dems in control he won't even have the option to be such an ass
So, in a nutshell, regardless of if the Dems pick up the senate or not, Bush's freehand has been shut down and investigations of the more ugly things such as the energy policy and extrodinary rendition can finally be explored. Plus, we may actually start to implement some of the 9/11 Board recommendations and not just pretend to. It's going to be a good couple of years.
Just remember, Politics are a soap opera you can participate in.