We liked using Last.fm just to see what our friends were listening to (the ones with good taste, anyway), but now that we can listen to whole tracks of any band we want for free, we like it even more.
Editorial note: Whoa! You've found a super-old post here on BuzzFeed, from an earlier era of the site. It doesn't really represent where we are anymore, and may in fact be totally broken, but we're leaving it up as a part of our early history.