I'm using more and more views on DrupalMU and I needed a way for the pages and blocks to be blog-centric. When you're on a specific blog you only want to see the recent comments on that specific blog, or only see the archive of blog entries by that owner. You also want the blocks to appear on any page of which the blogger is the owner: the user's profile, his blog entry listing, a specific blog entry, the comment page of that entry, ...