Some links that we referred to along the way:

http://www.microchip.com
-- Maker's of the PIC microcontroller.

http://www.aircables.net/
--Our RS232 -Bluetooth-RS232 module was from these guys

http://www.garmin.com/oem/
-- Our GPS module was from Garmin.

http://www.decadenet.com/
-- The XBOB3 Display Driver came from Decadenet.

http://www.beyondlogic.org/
-- Great site for basic protocols

http://www.maxim-ic.com/
-- Our RS232 level shifters, and the 1-wire temperature sensor were from these guys.

http://www.eyetop.net/
-- Producers of the Eyetop HMD that we used for this project.

http://www.mikroelektronika.co.yu/
http://www.mikroelektronika.co.yu/english/product/books/PICbook/picbook.htm
-- Great FREE book for learning PIC assembly, hardware & RS232 interfacing.