Here is some more info. Add links as you find them to the wiki, thanks!

• Forums on ladyada.net for Adafruit Laser and friends
• Forums on FabLab site for more general "fab lab" stuff, including laser cutters
• Hundreds of 'laser cutter applications' from Synrad mostly marking
• George T. Schmidt Maker of marking lasers, only sells Nd:YAG diode pumped lasers. Their systems run anywhere from $80,000+. Used by big companies like GM.

• A fellow's laser cutting experiences (with a Universal)