I can confirm that by replacing in drivers/staging/at76_usb the files at76_usb.c and at76_usb.h with those from the mainline 2.6.29-rc8 tree, compiling (using this driver rather than ubuntu/misc/wireless) the card does work.
I can confirm that by replacing in drivers/ staging/ at76_usb the files at76_usb.c and at76_usb.h with those from the mainline 2.6.29-rc8 tree, compiling (using this driver rather than ubuntu/ misc/wireless) the card does work.