Yeah, we all had big hopes for Foster after that first year. It was a great story: an un-drafted free agent, tearing up the league in the 2nd half of that season, but he just didn't get better. Maybe even regressed? His best asset is his speed, but he didn't develop in the more skills part of the game. Brown and Diggs, and probably Davis, made him expendable.
Nonetheless, I hope he develops and does well in Green Bay.