2009-06 on `extra1' (children's desktop thing at home, PCI wireless card).
2009-07 on `slab' (acer extensa 5420 laptop, screen recently mended)

Instructions for getting a working wireless driver.
Only the time on `slab' is recorded here.

http://linuxwireless.org/en/users/Drivers/b43 is the source of all detail.


# lspci -vnn | grep 14e4
05:00.0 Network controller [0280]: Broadcom Corporation BCM4311 802.11b/g WLAN [14e4:4311] (rev 01)

We see that this is on the supported list, for the b43 (rather than b43legacy):
14e4:4311    supported    BCM4311    b43


using the b43 driver from linux-2.6.25 and newer ?
# uname -a 
Linux slab 2.6.27-gentoo-r7 #2 SMP PREEMPT Fri Jun 26 01:57:39 CEST 2009
x86_64 AMD Turion(tm) 64 X2 Mobile Technology TL-58 AuthenticAMD GNU/Linux

yes ...
(note the need for kernel options:
	 Networking / Wireless / Generic IEEE...(mac80211)
	 Device Drivers / Network Device Support / Wireless LAN / Broadcom 43xx ...
)

Use version 011 of b43-fwcutter:
# wget http://bu3sch.de/b43/fwcutter/b43-fwcutter-012.tar.bz2
# tar xjf b43-fwcutter-012.tar.bz2
# cd b43-fwcutter-012
# make
# cd ..

Use version 4.150.10.5 of Broadcom's proprietary (firmware) driver:
# export FIRMWARE_INSTALL_DIR="/lib/firmware"
# wget http://mirror2.openwrt.org/sources/broadcom-wl-4.150.10.5.tar.bz2
# tar xjf broadcom-wl-4.150.10.5.tar.bz2
# cd broadcom-wl-4.150.10.5/driver
# ../../b43-fwcutter-012/b43-fwcutter -w "$FIRMWARE_INSTALL_DIR" wl_apsta_mimo.o

All files appeared ok, but the wireless card wasn't seen.
Including the acer_acpi module (outside the kernel tree, 
from gentoo's emerge:
# emerge acer_acpi 
then insert the module (set for each boot too):
# modprobe acer_acpi 
the following was suggested from a website, but seemed not needed:
# echo "enabled:1">/proc/acpi/acer/wireless

To connect to the WPA-PSK TKIP net at Dinton, this command was used:
# wpa_supplicant -i wlan0 -D wext -c /etc/wpa_supplicant.conf
Note the `wext' (wireless extensions) driver, implying that the driver
behaves properly and does all the right things in the right ways...