The gr-radio-astronomy list is now active on Yahoo:
http://tech.groups.yahoo.com/group/gr-radio-astronomy/
I sent invites out to a bunch of people, but only a couple of them have
responded. Sometimes the “invite”
messages from Yahoo get caught in peoples SPAM filters.
If you thought you should have been invited, but didn’t, (or if you want
to join but weren’t on the initial interest list that I invited):
http://tech.groups.yahoo.com/group/gr-radio-astronomy/
And join manually.