http://hemmers.blogspot.com/

The subtitle more or less sums up its content, and this is certainly an ambitious and interesting effort to generate good chess content. Worth a visit.

http://kingsgambit.blogspot.com/
A good blog featuring well-annotated games illustrated by ChessPad diagrams. "Blog dedicated to chess games and tactics, learning chess, analyzing games, kibitzing etc." Features good amateur discussion of openings and frequent problems to solve.

A blog that tries to meet the needs of people just learning the game.

http://chessconfessions.blogspot.com/
"The trials and tribulations of an F-class Player…" Lots of intelligent and interesting commentary on the author’s quest for chess improvement. The best chess self-improvement blog.

http://www.kenilworthchessclub.org/centersquare/
A blog devoted to chess books, history, culture and games.

http://colourchess.blogspot.com/
More an art site with a chess theme than a chess site, really. But it is interesting nonetheless.

http://chessfanatic.blogspot.com/
A fan’s blog with lots of interesting blurbs on books and websites.

http://www.xs4all.nl/~timkr/chess2/diary.htm
This long-standing and well written blog by noted author Tim Krabbe features his collection of discoveries and off-beat "world chess records" (from longest game without a capture to unusual under-promotions). It’s a must-visit site, rich in content and excellent writing. See also his main page titled Chess Curiosities.

http://chessmind.powerblogs.com/
Very high level commentary on very current games and events by a 2300-rated master. Formerly Dennis M’s Chess Site. Excellent. I especially like his annotations to recent GM games presented in java applet form.

High level gossip and commentary on recent major chess events. This blog is like the Daily Dirt with a more European perspective. First-rate material.