If someone is looking for a(nother) reason to run TomatoUSB...
[Tutorial - 30 Minutes or Less] Site to Site VPN with TomatoUSB and OpenVPN [qnology.com]
The intent of the tutorial is to provide you with the quickest and least painful step-by-step process for setting up a secure, yet simple Site to Site VPN between two locations, allowing resources to be accessed and shared from both locations.
Client to Site VPN can also easily be added.
All under 30 minutes! Video Proof! http://youtu.be/QsaYzgOIn6w