Interestingly, right now there are 38 members online. In January when Wiitalk was a young and upcoming forum 32 would have been a major achievement, now it's just ordinary everyday stuff.
Zelda, Mario Galaxy, Mario Kart, Guitar Hero III, Guitar Hero: World Tour, Battalion Wars 2, Medal of Honour: Heroes 2, Mario Strikers Charged, Excite Truck, Rayman Raving Rabbids, Big Brain Academy, Metal Slug: Anthology, Wii Play, PES 2008, Endless Ocean, Super Paper Mario
DS:
Mario Kart, More Brain Training, Advance Wars: Dark Conflict, 42 All Time Classics, Project rub, Animal Crossing: Wild World, Yoshi's Island DS, Picross DS
360:
Halo 3, Mass Effect, COD 4, Ghost Recon, FIFA 09, Top Spin 3, Portal: Still Alive, Geometry Wars 2: Evolved
Maybe some of us don't check the forum every single hour as we have things like work and family life to worry about.
More likely is that most people use the View New Posts link as the forums are really flaky at appearing unread even when you have read every thread in the forum or marked it as read.
I basically hit the new posts link, view anything that sounds interesting, and reply or create new threads without looking at the dates as I always check the forum every other day or so.