From the images I've seen it certainly looks like NDrive 11.
[Please Register or Login to download file] [Please Register or Login to download file] There are some refurbs on Ebay (UK) for £27 (F435) and £30 (S505) and I was tempted to get one to have a play with, but was wondering if there had been any significant hardware/firmware changes along with the change in software. The Binatone website is useless and I can't find any specs elsewhere.
I guess there's only one way to find out.......