Grudgingly I have to agree. Bynum for Martell, Diogu, and Frye is actually a pretty fair trade talent wise, especially when you factor in how injury prone Diogu has been in his career, how inconsistent Martell has been, and how ... well there's no nice way to say it ... how soft Channing has been since entering the league.
This wouldn't necessarily be a good trade from Portland's perspective since we already have greg, and we need Martell's outside shooting, but in a vaccum Bynum is clearly the more prodigious talent.