I, for one, am not too worried about Nokia's (lack of) involvement after the N9 release. Plenty of open source projects are driven by the community; seeing the number of people arguing over here before the phone is even released, I trust its community will be strong enough to support it. As for Nokia support, I expect it to be minimal, but not completely inexistant.

I will also be getting the N9 because I have been waiting for a viable alternative to Android. While Samsung's phones seem technically excellent, maybe even more so than Nokias, and the OS seems very usable, what worries me about Google is that they're an advertising company. That's how they make a profit. I don't buy into their "Do no evil" Santa Claus policies. Android is useful to them in two ways: to mine their user's data, and to pipe advertising to them wherever they are. This is why a fully open source OS is important.