Bush is a complimentary player.. while he would add a tangent to the Packers offense, I think a guy like Cobb may be able to be used in a similar fashion in terms of a wrinkle in the look.
Same reason I think Pat White would have been a nice role player for the Packers.. a variable to keep the defense guessing so to speak.
Noel Devine and Deon Lewis type.
That said.. Bush is going to command too much green to be a realistic target for the Packers, IMO.
Somebody is going to overpay for the name in other words.
"The oranges are dry; the apples are mealy; and the papayas... I don't know what's going on with the papayas!"