Thanks - I thought I was, but you never know. It didn't come back with anything or appear in top. I'll check again tonight.

Trying on a Windows XP PC now. The BT connection and pairing work! Yay! I can even ping the 770 (192.168.2.2) from the Windows PC (192.168.2.1). The PC is set to share its LAN connection, I've configured the 770's proxies with our local ones, and my resolv.conf with locally-sane addresses thus:

nameserver 192.168.100.1
nameserver 192.168.150.1
gateway 192.168.123.254

... alas, still no connection. Any ideas?