They will gain a net 11-15 seats in 2008. They will probably get ther majority back by 2010, dependeing on what people think of the 44th POTUS.
TX-22, FL-16, NH-1, OH-18, NC-11, IN-9, AZ-8, etc. will all be GOP gains in 2008.
LOL. TX-22 yes, IN-09 and FL-16 MAYBE, but I would bey you money right now that the rest of those will not flip.
And your 11-15 seat estimate is wildly optimistic considering President Bush/Iraq will likely be the #1 issue again in 2008.
I figured those using the PVI rating according to Cook Political Report.