Seeking IPv6 Security Resources

I am looking for IPv6 security resources to add to:

These could be best current practice documents, case-studies,
lessons-learned/issues-found, research/evaluations, RFCs, or anything else
focused on IPv6 security really.

I'm not requesting that anyone do any new work, just that you point me to
solid public documents that already exist. Feel free to share on-list or
privately, both documents you may have authored and those you have found