So this is basically just another way of tunneling IPv6 traffic over IPv4? Will you be adding native IPv6 for those of us that already have it?

Assuming I configured things right, this should now work. mmpool.org now as an IPv6 DNS entry. I tested with the direct IPv6 address as well: 2600:3c00::f03c:91ff:fe84:db84. Let me know if there's a problem.