I'm a loyal Live fan. I've purchased every year's release from 96 up to today, all of which were the console version. Actually, I did buy 2000 for PC, and it was a truly wonderful experience. Patches improve this game by about 200%. Only now-a-days I own a Mac, which forces me to buy the games for console.
I don't know anything about coding games, but I do know that my Starcraft CD runs on both Windows and OS X, so I know it can be done. I realize this isn't exactly a wish that affects a lot of people, but if Live could be coded to run on Mac as well, it would mean a direct payoff (more customers) for EA.
Anyways, just wanted to bring this up, hopefully it can make the wishlist. I realize it won't make an impact right away, maybe never, but it can't hurt to try.