Mr. Listwin, 47, was a top executive at Cisco Systems until recently. He has started the Canary Foundation with a mission to detect cancer before it spreads. Read a profile of his giving from a page one story in the Wall Street Journal of July 12, 2006.

This deserves commendation for at least two reasons. He has a specific, measurable goal. He did not wait until he retired or died to begin his substantial giving.