Mines, mines!
It's an old MB-2 that I got for $130 as SS (the price of an ENO hub) and I bought an IRO 135mm fixed hub (same as the Kogswell) for $40. So if you can get a bike sans rear wheel for $40, you'd be better off trying to find an old mtb with horiz. dropouts as a complete and building up the back with a cheaper hub.
BTW, it's totally a blast. I have big knobby 2.1ers on and I love getting out there in the nastiness.
http://www.zweknu.org/uploads/snow_bike1_1024.jpg
http://www.zweknu.org/pics/boston/p/...005_2_0008.jpg
http://www.zweknu.org/pics/boston/p/..._2005_0005.jpg
http://www.zweknu.org/pics/boston/p/...005_2_0003.jpg
http://www.zweknu.org/pics/snow/p/boston_snow2_0006.jpg
http://www.zweknu.org/pics/snow/p/boston_snow2_0007.jpg
http://www.zweknu.org/pics/snow/p/boston_snow3_0010.jpg
Oh, and I discovered to my delight yesterday that a case of Harpoon is exactly as wide as my rack is long. "whip, whip" with the bungee chords and I'm ready roll like a jolly goddamn elf.