@davidfor Hrm. Android *is* based on Linux. But I agree that it is... well not quite the same.
@BlauMond I strongly suggest Kobos regarding the use-case you're planning. It is incredibly easy to get root access to the device and there are lots, lots of add-ons for it.
If you're interested in developing apps, I think that it might be interesting for you if you took a look at
this and this to get an idea of what really it is possible to do with those devices. I have a Glo HD and a Libra and I've not been disappointed!