Feedable is a very slick Ajaxy RSS reader that has a lot of nice features to it. One of my favorites is that it has a "memetracker" built right in that shows you what the hottest items of the day are. They weight these by in-bound links. Even if you don't use the reader, the memetracker is certainly worth a look. It fills a void by reaching other verticals untouched by the Techmeme, Megite and Tailrank family of sites.
