This guy will argue just for the sake of arguing.
There is a place users can rate and voice their viewes on a game. It's called the Xbox.com forums.
I only slightly trust the reviews of professional game sites, so why would I, or anyone else, want to see a rating system from the public? Have you see gamesites these days? People rate games and haven't even played them, or rate them based on the fact that they're fanboys. LAME IDEA
From the MS response:
"...there will be free trials of every community game available on Xbox Live as well as a detailed description..."
What more do you need? these games will cost like $2!!