To improve the flow of communication about TrackHub developments this mailing list is devoted to TrackHub Collaboration. New members can apply by clicking the "Appy to join group" link. Posts to thetrack-hubs@soe.ucsc.edu address (viewable at http://groups.google.com/a/soe.ucsc.edu/group/track-hubs) will include updates about new settings the UCSC Browser releases as well as provide a potential avenue for Developers supporting Track Hubs on Genome Browsers to collaborate.