I decided to give it a try:
http://www.last.fm/user/nmskalmn/
There's one thing about this that is not cool: Songs that have Japanese characters in the tags are not sent to Last.fm. And I have quite a few.
This doesn't make much sense when they convert the 'Ayumi Hamasaki' in my mp3 tag to '浜崎あゆみ' on their website.