In honor of the last IPv4 blocks being assigned to the RIRs today, I've finally gotten around to setting up IPv6 tunnelling for the server running this website, and the AAAA records are live.
Tunnelling was necessary, because neither Slicehost, who I currently host with, nor Linode, the company I'm moving to soonish, support native IPv6 transport, nor dual-stack. So thanks, Hurricane Electric, for offering a disturbingly easy service to bolt up to, for free.