f-root does this on the IPv6 side: 2001:500::/48
Whether that's available everywhere on IPv6 networks, is as Bill pointed-out, another question. One of the root servers not being available everywhere seems like a pretty lousy idea :)
On another note- are there any folks on the list who haven't at least started testing v6- either in a lab or on their home network? Is there a particular reason why? Does anyone have any horror stories about deploying v6? (Aside from problems with tunnels resulting from A and AAAA records for the same host). With rare exceptions every transition I've read about has been pretty painless. There seems to be so much resistance to v6 and a lot of it seems to be misunderstanding or misinformation regarding the complexity of the changes. -Don