OSC Testing - works really well.
Using the below guide I was able to connect the TouchOSC app on my phone to a reaper install on my laptop; provides simple control over existing tracks and channels with very little latency, which is great. This means that, in theory, I don't need to use VNC to be able to control reaper.
It also means that there is an existing OSC convention for controlling the controls of Reaper.
As long as I can use different ones for controlling the sound effects software then we are onto a winner with the single ethernet shielded Arduino controlling the show.