Here's a cool little thing, project playlist. Search for a tune you like, add it to a playlist, store them all up and whack a bit of code on your blog. It searches sites that have mp3's uploaded links to them and outputs them via their funky little flash player. You can keep adding songs to your playlist too. I doubt the copyright mob will like it but...{insert naughty word with them on the end}

You can autoplay it or leave it to people to click and choose, or let it randomise.