Yeah I was somewhat surprised as well that joshumax didn't really advertise this in the community, save for that post on omni. On the other hand, if you think about it, it's not so surprising - he's not really "in the scene". And if you just google for, say, "nspire forum", you won't end up here so quickly - and tiplanet, which is more visible, is French after all. I had the same problem back in the day when I started programming on TI-82. When I searched for communities, the only place I came across was tout82.
What does surprise me a bit more actually is the lack of response around here. I mean, yes, this isn't really a Nspire place, but still... Even though I don't care about the Nspire at all, I still think nDroid is an outstanding and noteworthy achievement. Well, it's summer break, I guess
Regarding TI giving out the key, I don't really see it happening either. And nDroid will actually not be helpful in that respect, because it basically shows that TI is selling devices less capable than a cheap China knockoff smartphone or a RaspPi - at twice the price. But that's not really the point - ironically TI doesn't earn money for what their calcs can do, they earn for the things what their calcs
don't do. They don't do networking. They don't do CAS (well, the non-CAS models at least), even though even the humble TI-82 would in theory be capable of it. And that's not just TI's fault (even though it should be noted that keeping things as closed as possible has been a core element of their business strategy dating back to at least the TI99/4a more than 30 years ago). It's also the fault of SAT certificiers and school administrations around the world who are still clinging on to the concept of using such limited devices in schools in a time when things should move on. I'm sure that in 10 years using smartphones and tablets in maths classes will be normal and commonplace, with the use of online resources having fundamentally changed the way mathematics (and other subjects) are taught. But of course it will take some time to overcome the resistance at the administrative level, and until then TI will continue to sell locked down devices. They seem to share that prognosis, otherwise they wouldn't have developed the CE with it's rather significant design changes.
tl;dr nDroid will rule the world!