Blog
Progress reports and new development are reported now and then on the developer blog.
Mailing lists
There are two mailings lists: heimdal-announce and heimdal-discuss (ml-archive, mail-archive, gmane).
Bug reports
Bugreports should be sent to heimdal-bugs@h5l.org, PGP key for security sensitive bug reports (key id 3B81827E). The bugs are tracked in Heimdal's JIRA.
IRC
The developers are sometimes available on freenode's #heimdal channel.

