The IPv6 Forum offers a free WWW certification program and logo for IPv6 enabled sites. You can find there a ISP certification program as well.
Well, it's not a big deal. No rocket science. But I think it might somewhat help to raise awareness level for IPv6. When people see some IPv6 ready logos all around the web, they will probably start to wonder what this is all about and want to have that stuff as well. Ok, not the average Planet Debian reader, but others... ;)
There's just some caveats:
So, please support IPv6 and participate in that certification program. It doesn't hurt you, but might help spreading IPv6!