Cisco has introduced several interesting DMVPN features after I created my DMVPN: From Basics to Scalable Networks webinar. The new DMVPN: New Features webinar (register) describes them as well as DMVPN-IPv6 integration.
I’m planning to roll out at least one other new webinar before the summer break. More details to follow (hint: Scott Lowe has offered his help in content development).
You can get all of them (plus access to all live sessions in 12 months after purchase) as part of the yearly subscription to @ioshints webinars.