reply to zaphoyd
There is debate on rDNS for end-nodes in IPv6 land. It doesn't really make a lot of sense for non-servers - especially when you consider privacy addressing.I think it's safe to say you won't see custom PTR records on Comcast residential service. It is up-in-air if you will see PTRs of any sort.
I just want to make sure that all these changes are not going to make my native supported IPv6 router incompatible.