I do wish to do the Hamachi concept you are working with, as I saw on another forum, that you able to stream from TVersity through Hamachi using mplayer, but not through Media Streamer, yet. I will keep my fingers crossed for that when they at TVersity do their update.
So with Hamachi running in the background, in theory, then Media Streamer should be working with TVersity over a secure network. I might need to bug you on the Hamachi set-up when I get some time to put that together on the N770.