There's a new group:
http://groups.yahoo.com/group/Greek-Mythology-Link/messages
This group is owned by Carlos Parada, author of the luminous Greek
Mythology Link web pages.
Heretofore, there was never a decent Greek myth group around. Now
there is, and its run by the guy who should be running it. Looks like
it's time for me to ask again about buying/reading Diodorus Siculus.