Zigbee Datasheets
Hardware Datasheets
AtMega88 CPU (typical host CPU for endpoint)
Software Datasheets
Bitcloud (Zigbee implementation on Zigbit)
Serial Boot Loader users guide
Serial Boot Loader PC GUI Installation
Peripherals
20X4 alphanumeric LCD module (see RS or Farnell for many similar)
Zigbee Network Performance Information