You're right Green, Favre likes Ferguson. So does Sherman. They appreciate how hard he plays and that he's willing to play special teams. He's actually one of Green Bay's better special teams players (there aren't too many of them.)
However, Favre and Ferguson don't have a whole lot of history because Ferguson played little his rookie season and has been constantly injured the past couple of years. I'm sure he'll get banged up again this season.
The Packers only have three playmakers on their entire team and Walker was one of them. They're in for a long season.