The best thing to do is get an external hardware modem (something like this), then a wireless D-Link DI-713p router - it will dial the modem for you when you go to access the internet.  It also has a built-in print server - you plug the printer cable to the port on this router and everyone on the network prints to it.  Or get this modem and connect any wireless router to it.  The DI-713p is the only router currently being sold new that I know of that has the print server in it.  Lastly, you would need any PCMCIA (PC Card) wireless card to reach the router.  If you get the D-Link, get this D-Link DWL-650 card.  It is on sale this week at Best Buy.