Matt Mcgee has written a good post about various types of local bloggers. It is a nice introductin to a field that holds much promise in a post-newspapers era.
1. The Business Blogger
2. The News Blogger
3. The Social/Activist Blogger
4. The Community/Connector Blogger
5. The Casual/Personal Blogger
Then there are three others which add valuable context and zeal to blogging: the angry bloggers [who track government activity], the activist bloggers [who track government and corporate activity], the insider bloggers [people with inside knowldege of something].