The term lean is turning into a buzz word and it seems that everyone is talking about something lean. So why not call it just lean thinking as the book:
Lean Thinking: Banish Waste and Create Wealth in Your Corporation, Revised and Updated by James P. Womack and Daniel T. Jones
I watch a recent video on InfoQ by Simon Barker and Gus Power ( Product Development in the Land of the Free ) on how to develop real software products the smart way while inegrating the lean prospectives. Their focus was on the improvement of big companies but of course these same ideas can be impelented in the small companies with even bigger success. Of course here is the place to mention the concept of Lean Startup pushed by people like Eric Ries and Steve Blank.
Update: The Lean Startup Wiki