We support native IPv6 on all of our servers. You're not going to see it used anytime soon though.
The only people who use it are Asians (IPv6 is pretty big over there apparently) and spammers, and even those are on a limited basis. If you have large files to transfer between servers, sometimes IPv6 will be much faster, as the routes are less congested, so I like to use it for transferring backups. But generally speaking, there is no real use for IPv6 right now.