in addition to the thread about the elite system from kevzik....
http://www.cheapassgamer.com/forums/showthread.php?t=132818 ,
you can also pre-order the 120gb hard drive $179.99
http://www.circuitcity.com/ssm/Microsoft-120-GB-Hard-Drive-for-Xbox-360-882224460941/sem/rpsm/oid/177535/catOid/-16483/rpem/ccd/productDetail.do
http://www.cheapassgamer.com/forums/showthread.php?t=132818 ,
you can also pre-order the 120gb hard drive $179.99
http://www.circuitcity.com/ssm/Microsoft-120-GB-Hard-Drive-for-Xbox-360-882224460941/sem/rpsm/oid/177535/catOid/-16483/rpem/ccd/productDetail.do