http://www.parallax.com/tabid/832/Default.aspx

Tools for the parallax propeller chip that appears to be the heart of the badge.

http://www.parallax.com/Store/Microc...me,ProductName

product sheet for the main chip.

A couple other chips:
http://www.ftdichip.com/Products/ICs/FT232R.htm - UART / USB-serial chip
412RK - filter
http://www.alldatasheet.com/datashee...TI/LC126A.html - QUADRUPLE BUS BUFFER GATE WITH 3-STATE OUTPUTS

Included in the badge kit are two PS2 and a VGA port that can be soldered on (might have to remove the battery pack to get those soldered on). There are plenty of Propeller libraries for keyboard input and video output.