http://www.overclockers.co.uk/acatalog/Online_Cat...ventional_115.html << theres some routers there, i dont suggest wireless, but thats just me, wireless is fine but the way i look at it personally, anything which slows the connection down, or adds lag, is bad
They're not too expensive, get a 2 or 4 way router/switch.
Both computers will need Ethernet cards aswell which are only about £7 each so cheap really, try and get 2 ethernet cards (which are the same) which are at least 100/10, and then you'll need an ethernet cable (rj-45 i think).