http://reddit.com/r/chugalug exists thanks to Sean Brewer (Chugalug member). It's not tied to the mailing list, yet...
http://chugalug.1100489.n5.nabble.com/ is a Nabble forum view of Chugalug that can even post back to the list. Thanks William Wade!
http://www.linkedin.com/groups/CHUGALUGORG-99429 is an open LinkedIn Group.
Chugalug exists in many forms and forums, we will try to list them all here. There is also an IRC channel and other cyber-neuronic clusters of penguinitis out there... somewhere..