Cafax hosts a mailing list for general discussions regarding the Secure DNS technology. Down here you'll find a mail archive for the mailing list. This archive was installed as an afterthought, and I've tried to re-generate the traffic, but I won't promise that each and every mail that went through the list is in the archive, since it was primed from my own mailbox, and I might have deleted a few messages.
To subscribe to the list, send a message to dnssec-request@cafax.se with the word "subscribe" in the message body.