This is very cool, and I like what they are doing. Though I don't understand why one would use this over free public 6rd providers like tunnelbroker.net or usin

This is very cool, and I like what they are doing. Though I don't understand why one would use this over free public 6rd providers like tunnelbroker.net or using TEREDO in general, both of which will likely give much better performance and reliability. I used tunnelbroker.net for years before I had native IPv6. It works quite well.