If you do you should consider building one of these for our team.
http://ws9.jobnegotiator.com/html/flinks.html . The price isnt too bad becuase you dont use a hard drive, cdrom, floppy, vid card, and you can even share psu's. I have been thinking about doing that but I dont quite have enough money to build a 5 or 6 node one. Heres a cheap mobo that has built in lan bootable ethernet card.
http://cgi.ebay.com/ws/eBayISAPI.dll...tem=2084214592 then you could pair that with either a duron 1.3 or xp 1600+ and some cheapo memory. For the main computer you dont have to use one that is very nice. Hmmm...that would be nice have 5 -12 pcs humming next to me...wouldnt need a heater.