Adding link to a page with driver downloads, seems appropriate to this issue:
http://linuxwireless.org/en/users/Drivers/bcm43xx -- Broadcom bcm43xx broken with 2.6.20.8 kernel https://launchpad.net/bugs/85099 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs