I recently setup a VPS with Arp Networks. By default they set you up with your own IPv6 block. All you need to do is configure it to meet your needs. I reinstalled the VPS with Ubuntu Lucid (which is not one of their default OSes) so I needed to reconfigure my interface to use one of my assigned v6 addresses. The process is extremely easy. Here is the relevant section of my /etc/network/interfaces file:
iface eth0 inet6 static
address 2607:f2f8:a230::2
gateway 2607:f2f8:a230::1
netmask 64
After restarting networking, I was able to reach the machine via IPv6. You can verify the results of this by testing soljerome.com at http://ipv6-test.com/validate.php. Now that I’m IPv6 ready, I just wish that Comcast would finish their dual-stack rollout so I can use it natively from home. Seeing as how the IANA just allocated the final five /8 blocks of IPv4 address space, I’m hoping that the rollout happens sooner rather than later.