For those who are interested.
We released our new project on GitHub. It's a very fast booting linux system (buildroot) starting directly into a full screen web browser.
- boot splash including progress bar
- boots directly into a full screen web browser (video and audio playback capable)
- Node.js webserver included for hosting local web pages displayed in the browser
- HDMI CEC support
- RPi Wireless drivers, Ralink drivers
Take a look here: https://github.com/TOLDOTECHNIK/buildroot-webkit
It can be used as a standalone digital signage info terminal. We use it for displaying complex HTML 5 user interfaces.