CafePress allows you to create your own virtual shop of tshirts, mugs, and other merchandise. You upload the design and they handle the rest.
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.
MadKast is a blog sharing tool that allows users to share your blog posts via email, IM, sms, etc. It also adds sharing analytics by recording what people do with your posts. They are a TechStars funded business.
A site about how to get more from your blog, drive revenue, etc.