Michal Ludvig's RPM repos
Michal Ludvig maintains OpenVPN "unstable / development" RPM repositories for Suse, Redhat, CentOS and Fedora. Here's a simple "config wizard" with install instructions for different distros:
Alternatively you can go directly to the repository and find your way around:
These RPMs are for testing only, not for production. Their author has tested them on RHEL 5, CentOS 6 and OpenSuse? 11.4 but YMMV, but no guarantees of proper functioning is given.
For details, look at Repoforge homepage.