I have had my '07 DC Sport for about 4 months and have been irritated constantly by the bed bounce. I rode around this week-end with my Blue Ox equalizer hitch installed in the receiver hitch. The hitch weighs about 70 pounds and, by gum, all of the annoying bed bounce was gone. I'm sure that having 70 pounds hanging two feet past the bumper is not a solution you'll like, but at least it works.
Now I just need a way to put 70 "pretty" pounds in the receiver hitch.
Lance