Other web sites
Forums or other information resources on the net
http://thedmxwiki.com/ Has started, misc. terms explained, like CMY and RGB color mixing.
http://stagecraft.theprices.net/ The stagecraft mailing list, thousands of email threads per year! All technical stuff is discussed, from safety to cabling.
http://ww1.microchip.com/downloads/en/AppNotes/01076A.pdf Application note from Microchip on implementing a transmitter and receiver in a PIC microcontroller with assembler code.
If an example for Tx and Rx in assembler for AVR is needed, look here: http://www.hoelscher-hi.de/hendrik/english/demux.htm
If you know a useful resource, related to lighting tech, put it here!