Hmm. So you'd want it to use a connection you've created with fAPN, then? While it would be possible to ask the N900 to switch Internet connections, I have no idea what would happen if someone tries that with an incoming phone call in progress. It might not work, possibly the N900 would refuse to even try.

And it would not be possible to do this without switching Internet connections, because Fremantle can only use one APN at a time. (That's the reason MMS is such a pain on the N900.) From what I understand, this is not possible to fix on the old Linux kernel used in Fremantle (and upgrading to a newer Linux kernel is difficult because of Nokia's closed-source stuff). So you'd be forcibly disconnected from the Internet whenever someone calls.

But I suppose I could keep the idea in mind.

EDIT: There'll probably be a different solution, though. I do plan to add a possibility of searching on-device text files before going online. Hence, you'd simply download your intranet database into a text file, copy it to the N900, and hey presto, my program could look in that file to find out who's calling. Soon, I hope...