Atheros is the chipset provider of many 802.11g/b/a products. There is Linux, *BSD and commercial support for Atheros based cards, unlike Broadcom.
Several Mini-PCI radios exist that can be used with a WRAP or Soekris boards. Mini-PCI is more efficient than regular PCMCIA adapters.
Atheros radios can be used with RoofNet for meshing, and 802.11g / 802.11a backhaul links. The receive sensitivity on the cards is fairly high and they are well known for good performance.
FreeBSD 5.2+ ath driver for Atheros.
Places that sell Atheros
[^http://www.star-os.com/prices.php Valemount Networks in Valemount, BC sells the Atheros CM-9 11a/11g radios]
[^http://www.metrix.net Metrix in Seattle] sells various Atheros adapters.
[^http://www.wisp-router.com/product_info.php?products_id=332 Wisp-Router.com sells Atheros CM-9]
[^http://www.izmatt.com IzMatt Technologies Ltd. sells Atheros CM-9]
Check the Hardware page for other vendors.
On a scope
Atheros mini-pci running at 2372 MHz in the Amateur Radio service (peak value not reset) 
