I've been working on a score tracking system. It was originally for my tour group, Old And In The Way, but it's slowly expanded, and I'm now supporting well over 50 users for a number of groups. If you're lucky enough to come here, feel free to check it out at http://stats.ghshredders.com. If you like it and want me to add you, please PM me (Kazoo) on the Guitar Hero Hub. You can also reach me my emailing Kazoo at this website.
It keeps track of each game, instrument and difficulty per song. It also allows you to compare scores between two users. It still needs some work, but everyone that uses it seems to like it.
If you have any suggestions, please feel free to contact me.
UPDATE 4/19/2010: Now supporting 350+!
