here is my humble litecoin operation:

quiet room heater, software test rig, torrent whore, litecoin miner - antec 300, athlon 4400+ x2 (939), wc overclocked msi 5850:


very well made dedicated litecoin miner, soon to be a house heater once winter kicks in - antec 300, sempron (am2), wc overclocked 2x5870:


dedicated litecoin miner made of scrap parts, cost me nothing to build - athlon 3000+ (939), xfx 5850:


together with papa regor (https://bitcointalk.org/index.php?topic=7216.msg2602216#msg2602216):