IPv6

Ugh, I just noticed eth0 is configured to fe80. So I guess no v6 then. :(

Linode does not presently support IPv6, and has said that they probably won't do so until all of their transit providers support it.

Nonetheless, Hurricane Electric offers very low-latency, high-throughput and more or less easy to set up tunnels. Not as good/cool as native, of course, but usually sufficient, at least for ordinary purposes.

http://tunnelbroker.net/

There is a good overview on how to configure said tunnel on the Linode wiki:

http://www.linode.com/wiki/index.php/IPv6

The discussion tab on that page also discusses issues of deploying native (though the above posts in this thread summarize pretty well).