I just wanted to give you a quick heads-up: don't release any apps for Android right now that are compiled with the AIR 17 SDK.
Developers have been reporting the following errors:
Error #3672: Buffer creation failed. Error #3675: Texture format mismatch. Error #3702: Context3D not available.
On the other hand, if you need to get out an update right away, best results seem to be possible with the AIR 15 SDK.
This problem is only affecting Android! If you are targetting iOS, there is no need to worry; you can still (and should) use AIR 17 on iOS.
I'll keep this thread up to date if there are new developments on this problem.