Here I'll post some key Lua help and information links.

Programming in Lua (first edition) http://www.lua.org/pil/

Wiki Home page http://lua-users.org/wiki/
Lots of samples in http://lua-users.org/wiki/SampleCode

Libraries and tools for Lua http://www.tecgraf.puc-rio.br/~lhf/ftp/lua/

Lua Unofficial Frequently Asked Questions (FAQ) http://www.luafaq.org/

Collection of Lua projects http://luaforge.net/


Will add more..