DollarsBlog is a blog aimed at professional bloggers. Potential affiliate for wppro business.
BuzzBums is a blog directory. It costs $1 to join for a minimum of 25 years. They aggregate content and offer aggregated feeds for member blogs.
Automattic offers support services for WordPress and WordPress MU (Multi-User) through the Automattic Support Network. $2'500 basic, or $5'000 premium per person per year. Premium includes performance tuning, enhancements, etc.
First Blog Media are a professional podcast production company. For $200 a month (at Jun 08) they'll turn two of your text posts into fully hosted, produced, professional podcasts then host, etc.
Zemanta plugs into the major blogging platforms (WordPress, blogger, TypePad) and your browser to suggest related content (pictures, tags, links, etc) as you type a post. It can then auto-insert the results into your post (add links, pics, etc). Useful.
Daily Blog Tips is a site to help you make your blog better. Covers monetization, seo, etc.
John Chow is a blogger who blogs about making money from blogs. Along the lines of Darren Rowse at ProBlogger, with a totally different feel.
An article from Steve Pavlina on how to make money from your blog. Recommended by StrongLifts.com.
b5media is a blog network company. As at Jan 2008 they have over 320 blogs in 15 channels and over 10m unique visitors a month. They user WordPress standalone for all their blogs and manage monetisation centrally.