According to the study by Congressional Quarterly, Bud Cramer (D-Huntsville) voted with the Republicans on 40% of congressional votes, making him the 2nd most bipartisan member of the 202 member Democratic caucus. Indeed, both Alabama Democrats are more bipartisan than most of their other fellow Democrats. The average Democrat votes with the GOP only 9% of the time, while Artur Davis (D-Birmingham) sides with the GOP 17% of the time.
The Advertiser for one reason or another didn't discuss similar scores for Republicans, but I'll try to dig those up. While it's not a surprise that Alabama Democrats aren't in unison with national Democrats, it is interesting to see numbers testing the conventional wisdom.