I know very little about Steve Israel, the incoming chair of the DCCC. In the most recent session of Congress, DW-NOMINATE rates him as the 155th most liberal member; slightly more liberal than his rating of 166th most liberal in the 2001-2002 session. Israel will have to win roughly half of the roughly 60 seats currently held by Republicans who represent districts that voted for Barack Obama. A number of those are fairly entrenched Northeastern Republicans with modest pro-labor records (Peter King, Frank Lobiondo, etc.), so this will be an uphill climb unless the economy makes a serious rebound.
One of my big regrets this election cycle is that I got distracted by the bigger and slightly better news in the Senate, and paid less attention to the competition for the House and state/local races. With redistricting fights set to begin across the country, it should be easier to keep tabs on the situation this year.