It's not intentionally left out. Battlemesh is driven by the people who come there and participate, and if nobody is interested in a particular protocol or approach, it will not be set up or presented.
Disclaimer: I'll be presenting cjdns [1], the encrypted IPv6 implementation using public-key cryptography for address allocation and a distributed hash table for routing.
That's a shame, I wish I had known about this before I might have been able to put something together and present. The start-up I work with is heavily invested in developing mesh networking devices.
