I have a similar issue. I was just wondering which Broadcom card are you using? I still haven't gotten the problem completely solved. I was looking at this
and everything went fine until I get to "dmesg | grep wlan" and nothing happens. Also when I run iwlist and I have lo, eth0, eth1 and sat0 only. No wlan. For the connections listed, there is no wireless connection.
Almost forgot, running Mandrake LE 10.2 on a m6805 eMachines laptop.