There's nothing like getting a great score on a song, only to discover there was a typo in your ID3s and no-one's ever going to see it...
If MusicBrainz support is coming soon, then this could be moot (but maybe not, because even MusicBrainz isn't 100% perfect), so having AudioSurf look up exactly the high scores you'll be competing against (and not just telling you to look up what you THINK your song will be registered as) before you spend all that time getting the score, would be great... I understand it's some extra traffic to the server, but maybe even just returning the total number of previous plays by other users on that song would suffice.