The best sources I've seen on using NLP for persuasion are Kenrick Cleveland (www.maxpersuasion.co) Ross Jeffries (www.seduction.com) Essential Skills (www.essential-skills.com), Kevin Hogan (www.kevinhogan.com), David Barron (www.brightbomb.com), and Leading Edge Communications (http://www.nlpandhypnosis.com/). Leading Edge Communications has an excellent workbook on language patterns and free skill building exercises. Some of these sites have links to email discussion lists. Another list is Mindlist on Yahoo groups.