1] Added library for the older but more manageable FT232BL USB UART (USB to serial) component using online library component builder at:
http://www.rohrbacher.net/kicad/quicklib.php
library is at:
http://1010.co.uk/images/FT232BL.lib
packaging is TQFP32
2] Schematic is at:
http://1010.co.uk/images/atmega8usb.pdf
(note older PCB screenshot is incorrect)
3] 3 projected boards - independent UART and ATmega8 with circles for cpu_model, and both combined as above for 8 bit data interface sans parallel port