, despite the not so cool name, is the hottest new thing in the RSS world. They index all the RSS / XML feeds they can find and provide you with a search engine for just that content. What's even hotter is that you can save that search as an RSS feed. No more plugging a million sites in to you news reader and trying to keep them organized. Now you just set up Feedster searches for the content you're interested in, and plug the feed from your search in to your reader.
My prediction: Google will buy them within 6 months.