Keypad Interface for door opening with PIN o-t-fly

Sorry to be a newbie,

some questions:

=> Where can I get information on the C evalutation board ?

=> The interface between FT232BM and ATMEGA8 takes a lot of digital lines from ATMEGA8. Is it absolutely necessary ?

=> Arduino NG (ATMEGA8) can't sense the USB inputs at run time ?

=> How FT232BM interface with ATMEGA8 at run time in the Arduino NG ? (same question!)

I am quite puzzled.
Pierre.