Michael Porter's Profile at Harvard University:http://ksgfaculty.harvard.edu/michael_porter
Michael Porter on Wikipedia: http://en.wikipedia.org/wiki/Michael_Porter
Michael Porter's 5 Forces on Wikipedia:http://en.wikipedia.org/wiki/Porter_5_forces_analysis
Michael E. Porter's Homepage at Harvard University:http://www.isc.hbs.edu/
Recommended Readings:
Porter, Michael E., "What is Strategy?," Harvard Business Review, November-December 1996
Porter, Michael E., "Strategy and the Internet," Harvard Business Review, March 2001