same setup orinoco a/b/g card ( atheros chip), and a toshiba satellite 1805-s207, and knoppix 5.0.1
being reconized as ath0 also, ive tried: wlcardconfig, iwconfig, ifconfig, pump, and a few others and i still havent been able to get internet. ill post my specs in a few, maybe ill finally get it workin.

but you can try:

wlcardconfig (enter various info about your wlan, after prompt comes up)
netcardconfig (but doesnt let you select ath0 without modifing a file first, in the forums somewhere)
pump -i ath0 ("pumps" the internet "-i" to device "ath0")

also checout:

ifconfig
lspci -v
iwconfig