Promoting blogs (part II)

If you don't recall (or didn't read the post), I started this blog without a plan for promoting it -- I wanted to have a good number of postings before I started inviting people to it. For the past couple of days now, I've started to promote thefreshmarketer.com to colleagues, family, and by joining some blogging communities. I joined Technorati and saw my number of visitors jump dramatically. I want to continue growing the readership of this blog -- what other blogging communities should I join? Any suggestions?