beginner question: networkless use of hg

[Darrell Karbott]

Is it possible for developers without any network connection at all to 
collaborate using hg?  From what I can see in the docs it seems like you 
should be able to exchange changes (e.g. by USB key or some other means) 
using bundles, but then it seems like merging gets kind of tricky.

Is there a howto somewhere on best practices for networkless use of hg?

Also is there any way I can explicitly keep hg from trying to contact remote 
machines?

Any info much appreciated.

-- Darrell