There is a low-volume mailing list for questions, support and comments. See latexml-project for subscription information.
There is a Trac bug-tracking system for reporting bugs, or checking the status of previously reported bugs at Bug-Tracker.
to our friends at the KWARC Research Group for hosting the mailing list, Trac system and svn repository, as well as general moral support. Thanks also to Systems Integration for Manufacturing Applications for funding portions of the research and development.