I've been trying to connect to a PC wireless network... It has been a nightnare for me (tried several PCI cards, access points, etc...). Is there a wireless PCI card out there that has Mac support?
I finally bought an wireless bridge (Linksys) that feeds the wireless signal out to an ethernet port which plugs into the back of the Mac... Had a heck of a time setting it up, but once I got all the network numbers right (IP, gateway, WEP, SSID, etc...), my B&W G3 recognized the router and internet connection immediatly... Hope this helps...