being from philly, I think i have a pretty good idea of how its going to play out. Andy Reid will work the offense by spreading the ball around. There isn't a true #1 reciever in Philly game in and game out. McNabb will get great numbers but they will likely get spread around alot of players. I can't remeber the numbers but A LOT of guys got recieving yards last year from McNabb and the same thing will happen this year.
However that system is based on what they had before they signed Freeman - if he goes nuts and plays out of his mind who knows?