I'm surprised I didn't join the club long ago. I have a total of four socket 939 machines, with two of them running, an Athlon X2 4200+ and an Athlon 64 3800+. I have two Athlon 64 3700+ machines, both with dead motherboards. (One Gigabyte and one MSI...)
Neither is overclocked right now, but they both used to be. I should really get around to getting those overclocks back up there. Here are some CPU-Z screenshots, though:
