It is some kind of card that has an Atheros 5000 compatible chipset inside of it.

I would wait for support to be officially announced for specific cards from the Dev. Team before buying any such cards, as the driver is not finished yet (AFAIK), so you would be safer to wait until all the bugs have been squashed and work on it is complete and announced.

It does not appear that Prism2 compatible cards will be supported for a while longer (if ever).