bigfatblog (a fat acceptance blog)
showmethedata (affiliated with the Yahoo group of the same name; promotes the Health at Any Size paradigm; responsible and accurately-reported research on weight-related issues; and "scientific literacy" and critical thinking skills for the public)
You can add syndicated accounts to your friends list here.
Note that if you add these right now, I think they will dump lots of posts into your friends list, because I've just added them and LJ has downloaded many available posts from the blogs. But they shouldn't do it again after that.