I put TeamViewer on our Myriad server & two playout PC's without any problems. Only two of us have the password. Depending on your audio card setup, you can hear the audio from your Myriad PC as well, and you can copy & paste between host/client and client/host. Only snag is you need TeamViewer on every client PC you might use to login. There is an option to 'run' the software without installing it, so it will work for example in an 'internet cafe'. I believe there is also a TeamViewer 'app'. It has worked really well so far.
Simon, let us know how you get on if you decide to use it.