Jenny Levine talked about Suprglu at SCSL's Tech Express Institute, and I haven't had time to give it a try until now. It grabs all the feeds you tell it to, and compiles them by date. All your blog posts, del.icio.us bookmarks, Flickr photos... and more. It also creates a tag cloud for you.
The FAQWE reminds us that "all those bits and pieces of you are readily available for world consumption". Look at all the "social networking" playgrounds out there... 43 Things, 43 Places, Digg, Last.FM (I can't seem to get to that site) are just a smattering of offerings.