Peter Allgeyer  tries to maintain some "stable" build of m0n0 with
openvpn enabled, you can search for more on the list archives, here is
the last mail about that:

Peter Allgeyer, on Jan 13 wrote:
Hi,

newly created images can be found at:
http://www.protec-t.de/m0n0wall/downloads/

Be aware that the /cf-filesystem has slightly been decreased. Make
backups before upgrading. You have been warned ;-)

Best regards,
PIT

On 2/23/06, Bob Pierce <pierceb at westmancom dot com> wrote:
> I understand that OpenVPN used to exist in some of the beta versions of
> m0n0wall. Are there still plans of including this feature in a stable
> release of m0n0wall? If so, is there some eta of when that might be
> available?
>
> Bob Pierce
> Systems Analyst
> Westman Communications Group
> pierceb at westmancom dot com
>
>
>