Just was searching the forum for VRPN info for VVVV and saw that there was a request back in 2011 for implementation of VRPN in VVVV.
Just want to say how I got it working.
I found .net bindings for Vrpn
It worked out of the box with the provided dll in a plugin. See the printvals example in the vrpn source for infos how to implement it (it`s really easy).
My problem was that I was in need of a other vrpn version, so I had to recompile VrpnNet with another version of VRPN, it was really hard to find the source of VRPN (the old releases) but I found them on an ftp server:
After recompiling VRPN.net to the right version everything is working great.
With VRPN you get alot of devices working without programming a plugin
See Trackers on http://www.cs.unc.edu/Research/vrpn/
Good thing about VRPN is that you request data from the server, so you don`t have to worry about framerate and stuff.
Hope this is useful for some of you guys.