4p's to 29 p's Versions / 44 p's / 50 p's

http://businesscoaching.typepad.com/the_business_coaching_blo/2009/02/marketing-mix-how-many-ps-in-marketing.html
http://www.petersandeen.com/44-ps-of-marketing/
http://www.4psbusinessandmarketing.com/14022008/storyd.asp?sid=1749&pageno=1

Trenches

http://www.marketingtrenches.com/

Association

http://www.ninep.org/en/index.html