The one time I joined a forum gift exchange, the organizers collected all the names & addresses then sent out 1 name and address to each participant randomly and it was fun to get a gift in the mail. It was a $10 limit, and if you paired up members in the same country to avoid international shipping it could be easier than card exchange. You wouldn't have to worry about someone getting hold of the list of address' as you would only be sending one per person.