I like that I can move a server from one network to another and always know what address it will get. So what's wrong with autoconfigure? If I can enter static IPs, I can also keep track of a static IPv6 64 bit local address.

On another note, IPv6 in the USA is HORRIBLE. We've been doing IPv6 since 2001, and no upstream ISP in the US has EVER provided real IPv6: Globix, Level3, Cogent, Savvis... So when you tried visiting the site in October, chances are good that the tunnel connectivity was spotty. On the other hand, one of our servers in Rotterdam has had native IPv6 since the day it was plugged in.

We've since moved to a different tunnel service which runs through an ISP where a friend works and where they've been getting IPv6 running on everything. So far, so good, but it's obviously not perfect. I'd really rather not serve content via tunnels, but I'd rather serve through tunnels than not at all.