I don't know if this has been posted or you guys have seen this video, but it makes me rather curious as well:
http://www.youtube.com/watch?v=y_6uvO2T954
It's one of the very few videos it seems of a DEX408... Are they testing it more recently perhaps?
I'd love to see this become available to the masses! I'd be very tempted to buy one, especially since many tracks in the Netherlands are 1/8th or 1/5th scale...