Previous conclusions were it has wifi and bluetooth so it's posible, but is it likely? With such a niche device, how many people are going to know and live near another Pandora owner? Are developers going to create multiplayer options to cater for such a small audience?
As always with open source, if a developer wants it / wants to do it then it may happen.
Well, the multiplayer option could also support playing via internet. Pandora + WLAN + AP + internet connection = online play. In that regard, any Linux games with online multiplayer that get ported to the Pandora should be able to keep their multiplayer modes.
Bluetooth/ad-hoc WLAN multiplayer would essentially be a special case of netplay, although it would be nice if the Pandora interface had something to make setting up a game easier (maybe based on Zeroconf?).
I agree with you regarding internet play, and TINXL as others have said. That didn't appear to be the question.