Check out Last.FM

Some of you may remember audioscrobbler, a service that recorded what you were listening to on your computer to a webpage that shows other people what's on your playlist and what you like the most based on what you play more. Well, they've changed, they are now www.last.fm. They now offer an internet radio which will play music based on the artists you type in and that are in your profile. You have to register with them and you also have to download the small radio player program, but it's so worth it (when you install it and the settings menu pops up the first time, set the buffer to 28kbps). All the song titles and artists played on your station are recorded to your profile, so you can show other people what you've been listening to lately. Awesome to slip into a blog profile.