Comment 2 for bug 701173

I suppose, it's because of missing symlinks for brcm80211 driver.
This is files which should be found in the firmware directory, however, two symlinks ( bcm43xx-0.fw and bcm43xx_hdr-0-610-809-0.fw ) is missing on Natty Alpha2 i386 and Natty Alpha3 i386, so I have had to create it manually and do modprobe -r / modprobe on brcm80211 to make Network Manager see the Wi-Fi chip.
$ ls -l /lib/firmware/brcm/
total 368
-rw-r--r-- 1 root root 269595 2010-11-18 15:14 bcm4329-fullmac-4-218-248-5.bin
-rw-r--r-- 1 root root 1604 2010-11-18 15:14 bcm4329-fullmac-4-218-248-5.txt
-rw-r--r-- 1 root root 97376 2010-11-18 15:14 bcm43xx-0-610-809-0.fw
lrwxrwxrwx 1 root root 22 2010-11-18 15:15 bcm43xx-0.fw -> bcm43xx-0-610-809-0.fw
-rw-r--r-- 1 root root 180 2010-11-18 15:14 bcm43xx_hdr-0-610-809-0.fw
lrwxrwxrwx 1 root root 26 2010-11-18 15:15 bcm43xx_hdr-0.fw -> bcm43xx_hdr-0-610-809-0.fw