1Wired Science - Wired Blog
2Watts Up With That?
3Climate Progress
4Environmental Capital
5Dispatches from the Culture Wars
6TierneyLab - New York Times blog
7Gristmill
8Respectful Insolence
9Effect Measure
10The Frontal Cortex
11Next Generation Science
12RealClimate
13FuturePundit
14A Blog Around The Clock
15Greg Laden's Blog
16Living the Scientific Life (Scientist, Interrupted
17Gene Expression
18Cognitive Daily
19Uncertain Principles
20BPS Research Digest
21Deltoid
22Laelaps
23SciGuy
24The Questionable Authority
25denialism blog
26Good Math, Bad Math
27Thoughts from Kansas
28Aetiology
29Inductivist
30The Write Stuff
31FemaleScienceProfessor
32Dynamics of Cats
33Terra Sigillata
34Mike the Mad Biologist
35Sustainablog
36Thus Spake Zuska
37Framing Science
38Open Mind
39EvolutionBlog
40Aardvarchaeology

Ranking by Wikio.

If you haven't checked them out, Wikio ranks science-related blogs by the number and weight of the links to the blog. Wikio's latest monthly rankings have just been released. Over the past few months, Framing Science has ranked in the top 30 or so science-related blogs based on these metrics.