Anyway, I'm trying to get everyone to test IPv6, and believe me most people are not going to want to set up a tunnel to do this.
Edit: and the "point" of today is to test IPv6 in software. Only a tiny part is to make sure that IPv6 can be routed across the internet-at-large.
Though you can as well use the 2001:db8::/32 and later you can also publish your examples readily.
My comment was about any testing that involves the boxes that may want IPv4 or IPv6 connectivity to external world, apologies if I misunderstood.
Anyway, I'm trying to get everyone to test IPv6, and believe me most people are not going to want to set up a tunnel to do this.
Edit: and the "point" of today is to test IPv6 in software. Only a tiny part is to make sure that IPv6 can be routed across the internet-at-large.