I have never played, but I know that a lot of people do. Here is a link to a Bears message board where they are talking about the 2007 players ratings. Specifically, go down to the 4th posting. THere is a letter written from the player that received the lowest rating last year to the people at Madden. I doubt it is real, but it is pretty funny.
http://boards.chicagobears.com/forums/thread/547216.aspx
http://boards.chicagobears.com/forums/thread/547216.aspx