I've replaced the normal broadcom mini-pci card in my f4k with an atheros-based CM9 card. the card works great so far (only tested with my older 802.11b base station).
the f4k has a pair of light-up switches which control its bluetooth and wifi. with the atheros card installed, the switch appears to control power to the card, but the associated light is always blinking rather than being on when the card is on and off when the card is off. Do we know enough about how that sort of indicator is controlled to stop the blinking, or should I dig out a roll of black electrical tape to cover the light? - Bill