Today Traveler isn't supported in IPv6 environments.
IMHO we should be prepared for IPv6 in the full collaboration stack and Traveler plays an important role in that space.
IPv6 support could be in multiple stages. I think the most important part would be to fully support it for the communication between the devices and the HTTP task.
Or at least we need official documentation how Traveler could be used with a secure reverse proxy in front of it, which uses IPv6.
[ Daniel Nashed / http://blog.nashcom.de ]