According to Wired, Jason Calacanis is starting Weblogsinc, which looks to make money with business-to-business blogs:

Essentially, Calacanis' goal is to turn Weblogsinc into an umbrella for blogs, a for-profit center that dishes daily on as many as 300 topics and scores revenue from sources like advertising, events and classified listings. He expects the topics to fall under four main categories: media, finance, technology and life sciences.