I'm currently using Western Digital's Livewire for this. Works quite nice and I see there's a newer version out. You don't get the full advertised speeds though, think mine is like 8Mbps or something, advertised as up to 200Mbps. Depends on your wiring and other electrical stuff. Also, if you want to use it, it needs it's own power plug, can't use a multiplug or something similiar.
