Donald Driver and a 3rd for Brandon Marshall. That'd be a great trade, skillwise.
Only problem is, Driver's a great guy and Marshall has shown himself to be an annoying idiot, in my eyes. Comes down to sentiments here. Think about that duo, though. Marshall and Jennings and we'd still have (one of) the best receiving groups 4, maybe 5, deep.
As for Plaxico. No way. There's no reason, really, or Jones has to be constantly injured, Driver has retired, Jones hasn't progressed to anything beyond a slot receiver and Plaxico in some way has retained all this skills. Looks like a very far fetched theory.