Now that anyone who wants one can probably get one, let's get an idea of how many sports game players have a 360 and what kind of sports games you'll probably be into playing.
For me, I'll be into:
Football (if it doesn't suck)
Winning Eleven Soccer
Golf (Come ooooooon Links!)
This should give us some idea as to whether or not a league (say a NHL 2K6 360 league) will be viable.