ok, so i guess you are a cable user.
this sort of thing should do...
D-Link - Wireless Router - DI-624 802.11g Wireless 108Mbps Router but if you have a PS2 the DNAS doesn't work with a dlink router, So if you have a sony PS2 youll need to get a different brand, such as a Belkin.
Belkin : Wireless G Router although there are other manafacturers, and that is only if you have a cable connection. If you have ADSL youll need a ADSL Wifi Router.