Good day,
I've come across a nice page that lists all compatible WI-FI Cards for the Pocket PC OS:
http://www.cewindows.net/peripherals...irelesslan.htm
I used this link to buy my very own Network card. I've got a Jornada 565 with a PC Card Adpater as well, and bought the Microsoft MN-520 PC Card. I downloaded the Compaq WL-100 driver with WEP Support and it works great! Never had a problem with it! It also looks sharp; has a couple of green LEDs and the color also matches the Sled's Dark Grey Color.
As for finding a specific site that lists ONLY Cards compatible with PPC 2002, I can't tell ya. I haven't seen one.