sometime back when installing FC10, i tried installing ndis wrapper, and later i installed the broadcom driver bcm431 (i think). also i didn't remove the ndis wrapper.
all was fine untill a yesterday when ndis wrapper and some related packages got updated which somehow caused wireless to stop working. lspci showed the hardware present.
to get it to work, i did a yum erase ndis-wrapper, followed by a reboot.
it may not be the most elegent way, but it worked for me.
acer aspire 4720Z (mine has broadcom wireless, others may have atheros)