http://sfist.com
http://sf.metblogs.com
http://sf.curbed.com
http://blogs.sfweekly.com/thesnitch/
http://njudahchronicles.com
http://violetbluesf.com
http://missionmission.wordpress.com
The local blogs tend to link to each other quite a bit so if you find one you like its pretty easy to become exposed to more that might interest you.