Hi, I dont c this being relevant to Arduino it seems like you are drawing attention away from the main focus of what Arduino is all about! i.e. using an extra piece of hardware to further the score of your pc. OK 8-) So please stick to the point.
I am not sure if you are just trolling or if I am missing your point. The following quotes from the handbook seem highly relevant to what a number of people here want.
The goal of the Handbook is to be a signpost, a source of practical information and content that bridges the gap between new users and the platforms and resources
If you do not want to design your own circuit, you can choose from a huge collection of simple controller boards. By far the most popular one seems to be the Arduino , which can be seen as a "sensor board on steroids" if used in its native environment. Arduino is targeted at artists who are looking for a low threshold entry in the world of physical computing, without giving up too much device performance. The Arduino language is based on C/C++, and is well documented. Underlying the Arduino project is the Atmel AVR 8-bit microcontroller, and the GNU GCC compiler. The Arduino design is open hardware, which means you can build the board yourself if you want to. The tools for Aruino are mostly free software, and run on OSX, Linux and Windows.