Yeah, mobile support was a bit tricky to set up for us as well, but we managed it with just OpenVPN. The OpenVPN app for iPhone at least was able to be configured without too much headache, although it only supports a subset of the OpenVPN options. It should be compatible with the config in the article.
For Android, there's an OpenVPN app too - it uses the very handy and neat Android VPN API and besides needing certificates in the right format (not the text versions), it works well.
