Can anyone recommend good science blog aggregators? Places I can go to find blogs that reference research papers. I know about http://www.scienceseeker.org/ htt

Can anyone recommend good science blog aggregators? Places I can go to find blogs that reference research papers. I know about http://www.scienceseeker.org/ http://www.scienceseeker.org/ and http://researchblogging.org/ http://researchblogging.org/ but I wonder if there are more?