According to Forbes, the deal was worth about $10 million.
MyBlogLog is a tool that allows bloggers to put faces to their community. " If blogging was originally about building a community and having a conversation with people in that community, then MyBlogLog provides the missing link that makes those connections more real," wrote Chad Dickerson, senior director of the Yahoo Developer Network, on Yahoo's Yodel Anecdotal blog.
The move fits Yahoo's increasing focus on using social media as a differentiator, including recent acquisitions of Flickr, del.icio.us and Upcoming.
"Taken together, these vibrant web communities continue to provide Yahoo with a deeper understanding of communities and user activity that reach beyond the Yahoo network," Dickerson said.
MyBlogLog's 5-person team, including CEO Scott Rafer (former Feedster CEO) and founders Eric Marcoullier and Todd Sampson, will join the Yahoo Developer Network group.