Offcourse this is not a full tutorial how you can create a new OS. This is a simple proof of concept explaining how “easy” it can be these days.
Compile NodeJS for Your N900
This is how you can compile NodeJS on your N900 Maemo Mobile Phone. The Nokia N900 is an ARMv7 device, so this tutorial will maybe also help to build it for other ARMv7 devices (like the Galaxy S3 Tizen version).