A couple of ideas

Alvin Toffler, author of Future Shock, Power Shift, etc. - was a BIG hit in 
mid-late 90's.  As BIG as Hamel and Prahalad's Competing for the Future.

Mary Modahl - Forrester Research (VP - Marketing) - Mary recently authored 
the book Now or Never: How Companies Must Change Today to Win the Battle for 
Internet Consumers. Her research and consulting work in the Internet economy 
spans media, retail, financial services, consumer computers and networks, 
interactive software technologies, and business trade.  Mary is an 
influential and often-quoted analyst. She has been profiled in The Wall 
Street Journal and Wired magazine and has appeared as a guest on CBS, 
National Public Radio, CNNfn, and CNBC. In addition, she is regularly a 
featured speaker at company strategy sessions and industry events. 

Carl Shapiro - author of Information Rules- is Professor of Business Strategy 
at the Haas School of Business at UC Berkeley and has also served as chief 
economist at the Antitrust Division of the Justice Department.

Don Tapscott, authored the bestsellers The Digital Economy and Growing Up 
Digital