* How different is Android kernel from standard Linux (ie. Maemo) kernel?
* Is most of the hardware abstraction handled by Linux kernel, or the Dalvik VM internals and library?
* Is the kernel accessible? Ie. can I supplant my own init script and run custom binary in place of Dalvik?
* Is the Android hardware hackable? Ie. can I get direct access to the root partition and put custom content in?
I'm asking because I would like to get a better piece of hardware than N900 (namely HTC EVO 4G) and port Maemo 5 (ie. Mer) on it. But if Android hardware is a closed black box, I won't bother.
I don't have experience with Android (I like Maemo so much better) and I wouldn't like to spent a lot of money on hardware I could not hack.