[BAWUG] Converting to Ethernet

[homebrew]

I've seen all kinds of expensive gadgets that do this from antena (ether-ant) to small box converters. what I'm looking for is the cheapest solutions with out drawbacks to going cheap. I just want a ethernet connection and all I've see is USB client and well, these just don't plug into a system with out complications. I just want ethernet...    any ideas....   thx