Dr. Robert Burton delivers an hour long overview lecture at the Google campus... which has important (essential ?) overlaps with the material John Grinder speaks to... IMHO, this is a concise introduction to some of the problems that directly concern JG and will bring you up to speed if you're thinking about attending a training event with John and Carmen...

[ame=http://www.youtube.com/watch?v=QL12c4d0ro4]YouTube - Authors@Google: Robert Burton[/ame]