It looks like the AR5424 is not supported:
# dmesg |grep OpenBSD
OpenBSD 4.4-current (GENERIC.MP) #1829: Thu Sep 4 14:55:31 MDT 2008
# dmesg |grep ath
ath0 at pci2 dev 0 function 0 "Atheros AR5424" rev 0x01: apic 1 int 17
ath0: AR5424 10.3 phy 6.1 rf 10.2, WOR5_ETSIC, address 00:1f:5b:40:2f:61
The Atheros' site's technical information is neither. Event the product
bulletin is just a sales brochure.
Should I begin yammering at Atheros directly or a re-seller?
Which data is needed?