I think this is just a case of trading unhappy players.
The deal makes a lot of sense from the Portland perspect. Szczerbiak gives Portland a serious outside shooting threat. Derek Anderson at SG shot only 37.6% last season and just 30.5% for three. Szczerbiak shot 44.9% from the field and 43.5% for three.
SAR was terribly upset when the trade to the Nets fell through and threatened to hold out if he wasn't traded. However, I'm not sure this is going to make him any happier. If SAR had a hard time getting minutes in Portand, how is he going to do it playing behind Garnett?
Szczerbiak has a long contract while SAR's contract expires next summer.
BTW, I think this means that the Wolves will match on Hassell.