I can't give you a shed load of info, but I know that SuSE has very few problems with the Atheros chipset (I have a wireless card in my tower made by Netgear which uses the Atheros chipset and it works a dream), it recognised it straight away in both SuSE 9.3 and 10 and in the last 8 months I have not had any issues with it at all.
SuSE isn't too bright with Broadcom chipsets (I have a Linksys with a BC4306 chipset in another of my machines), it won't recognise them out of the box, but you can get them running using NDISWrapper.
If I were you I would have a look for either a Netgear or D-Link card with an Atheros chipset as so far everything that I have read about them has been favourable.
