According to this little app my all-time Last.fm chart is 40 percent mainstream, while my listening last week 19 percent mainstream. There are of course a lot of flaws in the way this site works but it's fun. In other Last.fm news, the music site will now scrobble tracks played on your iPod if you're a PC user (if you use a Mac, I believe you could do this already). I'm very pleased about this - previously the only way to tell Last.fm what you'd been listening to on your iPod was to get a separate application and turn off the official one. It was way too fiddly for me to bother with.