You guys talking about it doing either sensored or sensorless haven't seen the GM Genius 80 ESC, have you? It'll do either or as well and is already available for under $200. It doesn't have as high of a current rating, but if you're using a sensored motor, 200A doesn't matter since no sensored motors on the market pull that kind of juice.
Links to the GM-Racing products:
Motor:
http://shop.graupner.de/webuerp/servlet/AI?ARTN=97230
(Yes, this will run on a MM as a sensorless motor...confirmed by an employee of Team Orion who rebadges this motor to sell in the US)
ESC:
http://shop.graupner.de/webuerp/servlet/AI?ARTN=2894
IMO, the velineon isn't any better of a product that anything else currently on the market. Also, having to buy it as a combo only will severely hamper the sales of it to guys like us.