No need to have every word in caps...
So far the answer is no scanner is supporting NEXEDGE, and probably not in the future. It's likely the specs for this mode are proprietary and expensive (if the specs were even to be released), and there's no real push for it in the market.
best regards..Mike
Soon to change:
News - 2011 / NXDN(TM)-Forum SITE
NXDN uses the AMBE+2 vocoder, just like P25, however the software that makes it all work is less expensive to license than the P25 versions, so the cost of the radios are cheaper. We've been buying 800MHz NexEdge radios for around $600, and that includes the radio, battery, charger, etc.
Now, there are 2 different trunking protocols, Icom and Kenwood, and they are not compatible, so there is some more work that would need to be done to make this work, at least if you wanted to listen to a trunked system.
Also, since the signal has been digitized, adding encryption is really easy, as easy as checking a box on the set up. So, while it would be easy to add NXDN to a scanner, you may find that there won't be much in the clear.
Demand will end up being the driver. Looking at some of the scanners that are offered out there now, there seems to be a demand for higher end gear. As more NXDN systems roll out, the demand will increase and the manufacturers will likely offer this on some of the higher end models first.