I'm running a test VPS system at home running only ipv6 (ipv4 outbound for ftp and http). Its just a small experiment and may not be up for longer that 15 days.
If anyone wants to have a VPS to test anything i'm willing to give you 2 vps with 5 ipv6 ip each with 1 gb ram. It runs openvz and so far you can have debian, centos or ubuntu.
Drop me a line at vpsdev@gmail.com