I'll play
Since all 435 seats are up for election in the house I'll say GOP majority 225 to 210
In the senate, 37 seats are up for election. 18 seats held by GOP will be retained by GOP. Leaving only 19 seats open. Of those, spectors seat will go back to GOP and the special election for the Mass seat will go back to Dems., so no change with 17 Dem seats up for election and I'll split the difference.
How does 51-49 sound, with loser Lieberman being the independent caucusing with the Dems, and Biden holding the tie breaker. BTW, I say loser lieberman with the utmost affection for the fact that he has been on the losing side of battles more often than France. He was Gore's VP = lose; supported McCain = lose; came out against health care bill = lose. In fact, if there were a sinking ship with rats jumping overboard.... that's the ship you'll find him climbing aboard and right now he is
undecided. Which ever way he breaks to... that will be the losing side. and that's my real prediction.