The premise behind Suprglu is that many people have a Flickr account, various RSS and ATOM feeds flowing from sites like del.icio.us (it supports a whole range of default sources, plus any feed you want to add), and at least one blog, maybe more. By registering with Suprglu, you can build a composite site which aggregates all of those sources into a single page. So, if you visit my Suprglu site, you'll find my latest photos from Flickr interspersed with posts from my external blog. Like Blogger, Suprglu is themable.
The only big problem is that it seems to lag behind by 24-48 hours.