Here's a demo everyone here can start in less than 1 minute: http://free-electrons.com/community/demos/qemu-arm-directfb/
You just have to download 1 file and run qemu. Let it surprise you! This demo shows that it's possible to implement a full-featured embedded system with a graphical interface within 2.1 MB! Feedback, suggestions and contributions are welcome! :-) Michael. -- Michael Opdenacker, Free Electrons Free Embedded Linux Training Materials on http://free-electrons.com/training (More than 1500 pages!)