arg. i've been trying this on XP that is hardwired to internets via network switch for about 3 hrs and its not working out.
is there another thread that had more clues?

On XP i have set up ad-hoc network.

if i try bridging, i connect N800 to the network and on XP i get:

Network bridge:
Local Area Connection
Wireless Network Connection

both say: connected, bridged.

but i can't get to the internet on either XP or N800

if i try to remove the bridge and just enable Internet Connection Sharing on Local Area Connection, and connect N800, my XP internet works but, N800 doesn't work anyways.