Wallace is going nowhere. We're stuck with him for at least 2 years.
Humphries = Expiring contract this year
Bass = Expiring contracts next year
Wallace = Expiring contract the year after
Humph is tradeable this year... the other two become valuable as Theo Ratliff throw-ins over the next couple years.
Boston will not have cap space at any point in the foreseeable future. Those contracts provide trade flexibility over the next few years... just gotta hang onto them until their moment comes.
Additionally we have
Bogans/Trade exception this year
Jeff Green next year
Courtney Lee the year after
Most of them will be stuck here unless we are able to utilize them as salary filler.