A lighting link-farm -- many of these are themselves nests of more pointers.

http://techno-fandom.org/~hobbit/lighting/lighting-linkfarm.html
That's THIS file -- for easy single-point access

Useful lighting / production info

http://theater.harvard.edu/jobs/crew/electrician.html
Excellent description of a theater electrician's job. The whole Harvard theater site is really good, albeit tailored for their specific spaces.

http://theatre.harvard.edu/jobs/ld/quick.html
More from the Harvard folks

http://www.mts.net/~william5/sld/sld-toc.htm
An extensive "Lighting Design 101" set of documents

http://www.d.umn.edu/~mharvey/th1501a-z.html
Nice description of the design process. Also look at "classindex.html"

http://www.d.umn.edu/~mharvey/websitelighting.html
Many good pointers in general

http://www.northern.edu/wild/th241/ldw02.htm
http://www.northern.edu/wild/th241/th241.htm
http://www.northern.edu/wild/th241/ldw03.htm
Larry Wild's theatre courses and other info. There's a *ton* of stuff here

http://www.northern.edu/wild/jressay.htm
Larry Wild's recreation of Jean Rosenthal's "photo essay" on directionality

http://www.vincentlighting.com/glossary.shtml
One of many glossaries out there. Google some of the terms for many more

http://www.people.virginia.edu/~rlk3p/classes/usem171/Glossary/Terms.html
Rock-n-roll terminology

http://techno-fandom.org/~hobbit/flipcoil/howto.html
How to properly over/under coil up cables

http://www.dmx512-online.com
Good rundown on DMX by Ujjal Kar

http://www.prosoundweb.com/lighting/articles01/dalelee/dmx.shtml
DMX protocol description

http://www.hollywoodlights.com/production/techtips.htm
General theater tips and info

Forums

[There are probably many others besides lightnetwork, too...]

http://forums.delphiforums.com/n/mb/list.asp?webtag=lightnetwork
The LightNetwork forum -- very active, very professional. [Delphi site wants cookies, though]

You can also send a message containing "HELP" to ecartis@techno-fandom.org to see the procedure and options for signing up on the techno-fandom list.