So, I was looking at gamertags.
http://card.mygamercard.net/SirPoonga.htmlSomething occurred to me. Microsoft needs to have a a top 10 games list. They have the data stored, it's just a matter of creating the report. It would only look at the 5 games in everyone's gametag. That way older games that are dieing out but were insanely popular won't stay on the list forever. Well, there could be an all time list too.
Basically, it will end up giving you a popularity poll.