There are other players involved (Chris Carr, Bill Curley, Elliot Perry, etc.), but they are not the center pieces of this deal swapped in this deal.
Bucks trade Terrell Brandon, receive Sam Cassell.
Nets trade Sam Cassell, receive Stephon Marbury.
Wolves trade Stephon Marbury, receive Terrell Brandon.
Terrell Brandon was a very good point guard as well as one of the most underrated players of our time. Milwaukee, however, experienced greater success once they acquired Sam Cassell. He, Glenn Robinson, and Ray Allen helped make the Bucks contenders.
New Jersey made a mistake trading away a quality point guard in Cassell, as Marbury never helped the Nets (or any other team for that matter) do much in the playoffs.
Minnesota experienced the "Stephon Marbury Phenomena." They became far better after trading Marbury. Brandon proved to be the floor general that Kevin Garnett needed, but the T-Wolves didn't make it past the first round of the playoffs, until Sam Cassell signed with them in 2003.
Trade winner: Bucks