I agree that it's too long... more importantly, I don't like Xbox360 type names in general. I prefer names that aren't dated. I've seen some names like its2006.com and I'm like, "why" I like the more generic approach... and staying away from TM issues
MS doesn't really care about Xbox 360 TM names. They have a whole list of fansites on their own site. Plus Xbox 360 forum names are hard to find nowadays.