These are the pairs I know of:
CBartolomei (two of the three from last year's CES). He has pics in the gallery I think.
Julian (dealer demo)
Roop (dealer demo)
Me

I believe the cabinets initially built for me (walnut) will be used by Brian as his demo pair. Long story, don't ask
Then there is the third cabinet from the 2003 CES trinaural setup. I suspect it found a mate and was sold as a pair, but I'm not sure.
Big B had at least one other pair of piano black cabinets ready to build, so I expect someone else will have a pair soon.
Also I'm not sure if other VMPS dealers (e.g. Dynamic Sound, Ribbonspeakers.Net) will be getting demo pairs at some point. I remember reading that one pair was possibly earmarked for Anthony Cordesman too
Ekovalsky,, are you the second RM/X owner??