So... you have a script that connects you *to* a network (through iwconfig or something similar), but you need to trick the rest of the n800 into believing that you really *are* connected?

I think there's something with DBUS commands that could tell the maemo ICD (internet connectivity daemon) that you've connected..
Some of the stuff here looks promising, but it's not exactly what you're looking for.

Anyone with more DBUS experience got anything?