Maybe I am alone in this but it looks like Hurricane Electric is having problems with their tunnel broker router. I am unable to connect to some common IPv6 addressing via the tunnel - well actually, I am unable to connect to ANY public IPv6 addressing through them right now. I've been e-mailing in asking for them to take a look but to no avail. Hope they get it fixed soon. I may have to find some other tunnel broker services to use as I am in the middle of testing out and building some lab configuration.
If you are using he.net's tunnel broker service please drop me a line, I am trying to make sure it isn't isolated to my tunnel configurations and having someone else out there using it makes confirming that sooo much easier.