Moving mailboxes in Postfix

[Curtis Vaughan <curtis@npc-usa.com>]

Can anyone tell me if it's possible to move mailboxes from 1 postfix 
server to another?  Provided, of course, that it's not a total pain in 
the ass to do.

Basically, I have users on a virtual domain on one Postfix Server that I 
want to move to a new server where they will be the primary domain.

Curtis