GetGlue is a service that helps you find your next favorite movie, book, music album or other every day thing (here's a list of supported categories). GetGlue shows you things that you'll like based on your personal tastes, what your friends like, and what's most popular on GetGlue.
Feedalizer is a small Ruby library that glues together the standard library's RSS library with Hpricot in order to make it easy to transform web pages into RSS feeds. If you ask me, it makes it too easy.