Here are the forums I think can go:
D&D Software: It seems to me that D&D-releated software will be coming out at the exact same instant Hell freezes over, Ryan Dancey comes down with a terminal case of humility, or the Packers somehow manage to justify the extra .5% sales tax for their stadium they strongarmed the county in to by, say, winning a firkin' football game. I.E., never. There seems to be some non-commerical software floating around, like James Buck's generators, but not enough to justify an entire forum. Put it in General Discussion.
d20 System Games: There's too much overlap between the d20 System forum. Merge the two.
Plots, Whereabouts, Rogue's Gallery, Homebrews : Merge these four into a general "DM Help Center" forum.
General Monster Talk: What does this forum do that General Discussion and Conversions doesn't? Axe it.
James Buck's Wish List: This can be merged into General Discussion.
Fantasy Netbook Community Council: Just combine these four forums into one. I don't see why each particular aspect of the Netbooks needs its own forum.