Outdoor Computer Cases?

danci asks: "I'm building a wireless network in a local community using Wavelan/IEEE cards. I'd like to avoid purchasing Wavelan access point so I'll try to use Linux instead. So I'd like to build some rather small but robust machines that should be able to survive summer, winter, snow, rain and most other weather conditions while being mounted on the antenna mast (or at least as near as possible - cable length heavily decreases range). So I guess what I wanna know is whether there are any weather proof, computer (PC) cases available out there. Or some other, low-cost solution (don't want to build a house around all that)." This would be too cool. Just imagine, a series of computers mounted to telephone poles with wireless network cards...