Some that may work
Antec NSK1300 (small psu, but should run a decent system) - http://www.antec.com/us/productDetails.php?ProdID=91300
Ultra MICROFLY(get it without the PSU) - http://www.ultraproducts.com/product_details.php?cPath=13&pPath=439&productID=439
Apevia X-QPACK-BL - Same as the ultra
Apex TX-381(drop the psu and get ure own. only the handle is lan'ish) - http://www.ncix.com/products/index.php?sku=23492&vpn=TX-381&manufacture=Apex%20Computer%20Technology
Thermaltake Lanbox Lite (windows optional) - http://www.thermaltakeusa.com/product/Chassis/minicase/lanboxLite/vf6000bws.asp
Thats all i can think of right now....just remember cooling is less in most of those cases....so maybe a 6750 + 8800GTS(the 112 sp version) at stock is a good idea. it will still game...