"User innovation refers to new product and service development by individual users or individual user firms for themselves, without the assistance or involvement of producers."
Financial Times. (n.d.). Definition of user innovation. Retrieved from http://lexicon.ft.com/Term?term=user-innovation
The following videos are a lecture series given by Professor Eric von Hipple, from the MIT Sloan School of Management.
Innovation by 
Inventive Minds: Creativity in Technology by 
The Practitioner's Guide to User Experience Design by 
Sustainable Innovation and Entrepreneurship by 
Getting to Innovation by