Quoting from OpenVZ official announcement:
For early adopters and advanced technologists who want to test virtualization technology with the IPv6 network protocol, the OpenVZ project today released its operating system-level server virtualization software technology with support for the next-generation Internet Protocol Version 6.
In addition, support for bridged networking is now available, which gives OpenVZ virtual servers the ability to run software that relies on special network capabilities such as broadcasts, multicasts, or those having a MAC (media access control) address…
Download it here.