I've recently seen this problem on 1.1 too. I think it is now fixed with an update of kernel-mamba-nongpl-wl that will be available in 1-2 hours, or you can fix it yourself by replacing package kernel-mamba-wireless-backport with kernel-mamba-wireless and rebooting.

If you can cable-connect just do:

sudo apt-get install kernel-mamba-wireless

That seems to have done the trick, except that my wireless card shows up as eth1 (and I thought that eth was short for Ethernet). But my wireless is working, so I'm happy.

Yes, the interface should be renamed to wlan* for this driver. Maybe this will be done upstream by driver developers in future, at the moment I've recently fixed udev to keep persistent interface naming so that eth0 and eth1 are not swapped after reboot and that should solve the first need of having working network connections from the user point of view.