To be fair, OpenVPN isn't really designed to obfuscate the nature of the traffic any more than IPSec does. Both are about creating secure tunnels, with OpenVPN being very easy to configure and maintain as opposed to the pain that is IPSec. I use OpenVPN a lot, both for our road warriors, and to create the secure tunnels between our locations. In that role it really is an incredibly nice piece of software. But if I were looking at making something whose intent was to disguise that I was encrypting traffic at all, it's not the tool to use. Now as I understand it OpenVPN is pretty modular, so I would imagine if someone were to come up with some other encryption mechanism meant more to get around deep pack inspection, that would probably work, but as I said, such methods will inevitably make for a slower tunnel, and as OpenVPN is more of an infrastructure VPN, I'm not sure it's quite the right tool for that job.