Cisco Aironet Wireless 802.11b

This is a Mini-PCI WiFi Adapter that is installed in a Mini-PCI slot.

Features

Chipset: Cisco
IEEE Standards: 802.11b
PCI ID: 14b9:a504

IBM Partnumbers

IBM Order PN (WW): 31P8301
IBM Order PN (Japan): 31P8302
IBM Order PN (EMEA): 31P8303
IBM Order PN (China): 31P8304
IBM FRU PN (WW): 26P8319, 26P8435, 26P8496
IBM FRU PN (Japan): 26P8323, 26P8369, 26P8500
IBM FRU PN (EMEA): 26P8321, 26P8367, 26P8498
IBM FRU PN (China): 26P8325, 26P8371, 26P8502
Other IBM FRU PN: 91P7406,91P7408,91P7410,26P7412

Also known (in IBM literature) as....

Cisco Aironet Wireless 802.11b Mini PCI
802.11b Cisco Wireless Card (Sherman III)

Linux WiFi driver

A opensource Linux 'airo' driver is available, and included in recent 2.6 kernels.
There is a sourceforge project page for this driver, but it seems unmaintained.
One of the developers has his own project page here, but there have not been any updates since September 2004.

In addition there is a slightly dated driver available from Cisco after jumping through a bunch of hoops, such as providing Cisco with your personal information.
The current Cisco driver version is 2.1 and only supports select Linux 2.4 kernels.

Cisco Aironet Wireless 802.11b