Like.fm aggregates, simplifies your music discovery and sharing
Like.fm aims to provide one-stop shopping, so you and your friends don't have to remember to follow each other on a dozen different services. By aggregating data from a wide variety of sources, Like.fm hopes to make itself the place to get your new music recommendations. Facebook Connect support is also built-in, making it easy to find and follow your friends as you build out your Like.fm profile.
There's still a lot of construction going on at Like.fm, but browser extensions are already available for Google Chrome, Safari, and Firefox. There's also a Windows desktop client to scrobble your plays in iTunes and Winamp.