My favorite IPv6 tunnel broker Sixxs.net recently announced, tongue-in-cheek, that they would be accepting no further new registrations and will also be throttling existing users. Those still interested should preferably contact their Internet provider and demand native IPv6 of them. The backdrop to this is that a large number of Internet and hosting providers would persistently refuse to offer native IPv6. Instead, these providers issue recommendations to simply register an IPv6 tunnel. Sixxs themselves would now put paid to that.