Hey buckmoy,
You need something like the Linksys WRT54g or Netgear WGR614: both of these will use the ethernet cable that your desktop machine currently uses to "split" the connection, kind of like a four way plug.
Both of my suggestions have the ability to connect wireless and wired clients simultaneously, so you can both surf at the same time.
Hope this helps,
Phil.
PS: Welcome to cableforum
