Hi, yep, I have set up a tunneling page at http://v6tunnel.rosenkeller.org/
You can get single ipv6 addresses as well as subnets (16,32,48, or 64 -bit-subnets) there. Please check it out and see wether it works (I've tested it and everything worked fine, but that was a long time ago, and so far noone has ever used it :-) Greetings Chris
