Basically the guy at Best Buy was correct. (Wow!) However, you will need to make sure that the PCMCIA (now known as a PC card) wireless card that you purchase, is compatible with OS 9 and the Mac. Farallon make one, or used to, and I found one at ClubMac http://www.clubmac.com/clubmac/shop/detail~dpno~133181.asp
Once installed, you just need to configure the Airport software and away you go.
Hope this helps
I have an old Powerbook G3 running OS 9.X and would like to be able to take advantage of the wireless hot spot where I work. What do I need to accomplish this with my Powerbook G3? Special cards installed? Airport? Specific software? Or is it even possible to have wireless access with this older version of Powerbook? I spoke with a computer salesman at a local Best Buy and he stated that all I needed was a Linksys wireless network card plugged in the side slot. Could that be true? Or are old Powerbook G3's strictly a plug-in-the-phone-cord operation? Thanks in advance....