WRT to AD, pretty sure end-user is feasible, I recall reading as such, can't recall where now. But as you say even if it is, there's still the potential legal issues... sigh.
So Alien Dalvik is a solution to the N9's app needs, in theory, but it won't be something you can install yourself, if you end up with an N9 in your pocket. Instead, Nokia or your network would have to slap Alien Dalvik on the phone. "Because it goes really deep into the root of the OS, it cannot be a downloadable application. It would have to be ported prior to the phone being shipped. It would have to be a decision of the mobile phone manufacturer or the network."
That's a good point, hadn't considered that, might raise that in the thread if you haven't already.
Surely google would just pay a once-off settlement (or some sort of licensing might be arranged), & not bother w/a total re-write? It'd be risky on their part, the market's moving so fast, or maybe they've already started, who knows.