I have been writing a series of profiles giving the landscape in the House elections next year. What I did was use the partisan makeups of districts along with incumbent strength to generate lists of 74 seats we should target (as well as a list of 43 seats we need to worry about defending on our worst day. They were up on 9/23 and 9/26, respectively. Here are links: http://www.dailykos.com/story/2005/9/23/173131/345; and http://www.dailykos.com/story/2005/9/26/15543/5440.
But, you can't beat somebody with nobody, so the next project is to examine who we have as challengers and open seat candidate, as well as who the GOP has challenging our incumbents and in open seats. The bad news is that as of this writing, there are a lot of holes. The good news is that we're still in the recruitment phase--the first filing deadline (Illinois) is still two months away.