The HPFF administer mailing lists. There are a number of different lists which deal with slightly different areas of the language. These are
hpff@cs.rice.edu hpff-interpret@cs.rice.edu hpff-distribute@cs.rice.edu
To join the list send an Email to
hpff-request@cs.rice.edu hpff-interpret-request@cs.rice.edu hpff-distribute-request@cs.rice.edu
respecitively, with a message:
subscribe <email-address>
in the body of the message.