Bob Metcalfe of 3Com
Jamie Zawinski of Lucid and Netscape
One of the Sun founders. Probably Bill Joy, but it might be neat to see Vinod Khosla's POV too.
An early employee of Microsoft. Doesn't have to be Bill Gates, but someone who was there before the IBM deal.
Some founders whose startups failed - both in the early stages, before we've ever heard of them, and those who crashed spectactularly.
One of the better sources for financial train wrecks is "When Giants Stumble" (http://www.amazon.com/When-Giants-Stumble-Business-Blunders/dp/0788199439 ), which is a bit dated (lots of retail/manufacturing/finance, not much technology) but thorough.
Also some European startups such as skype, last.fm, moo etc
Maybe the founders of cisco, qualcomm, juniper... The value and impact of these companies is significant, revolutionary.
Alex Welch (photobucket)