Not if they lose PA-06. Not all that likely, but nor are most of the races you point out.
I've been waiting six years for Jim Gerlach to lose. Ever since he defeated Dan Wofford, son of Harris, who is one of my heroes. I guess there's always 2010.
Yep, the man seems seems to be made of teflon. The ironic thing is that if the DCCC had focused on PA-06 in 2002 the way they did in 2006, Wofford would have likely won. Instead, Democrats decided in 2002 to throw money into either easy pickups like MD-02 and MD-08 or open races they ended up losing in landslides like NH-01 and NM-02.