Looks like issue is resolved in this kernel. Connected to a WEP encrypted network. On gotcha, which I am guessing would not appear on a default install, is that even after the first reboot, I had to sudo modprobe -r prism54pci then sudo modprobe prism54pci to make the eth1 interface appear. On the next reboot this did not occur.
** Changed in: linux-source-2.6.20 (Ubuntu) Status: Needs Info => Fix Released -- modprobe -r prism54 freezes system https://launchpad.net/bugs/85250 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs