While hypervisors standardization and inclusion in Linux kernel are progressing very slowly, OpenVZ finds its way in one of most trustworthy distribution: Debian.
Quoting from the OpenVZ official announcement:
The OpenVZ project today announced its operating system-level server virtualization software technology is incorporated into Debian GNU/Linux giving users full access to OpenVZ software, which helps increase server utilization rates.
At the same time, the OpenVZ project revised licensing terms for its user-level utilities under the GNU GPL license to comply with the Debian Free Software Guidelines. Also, OpenVZ software now conforms with the LSB/FHS (Linux Standard Base/File Hierarchy Standard)…
Check OpenVZ kernel patches here.