I feel bad because my Xbox Live gamertag is "HMXTaylorLee".
I used the HMX prefix to show my respect to what is probably my favorite game company out there, and how I bought the 360 SOLELY for Rock Band 2. but I sure did not intend to cause any troubles. I am not currently a member of the XNA, or currently authoring Rock Band Network songs, but if I were, I would do everything to make it abundantly clear that I have no relation to Harmonix.
I get asked if I work for Harmonix quite often on Quickplay, and I always tell them "No, I just like them a lot".
If I had seen this sticky, I would have named myself something different, honest!
You CAN change your GT (though I never really thought it was worth 800 points)
http://www.rockband.com/forums/showthread.php?t=32421 Seriously, I'm not taking the link out of my sig until we've got Dethklok.