I met these two people on the streets of Manhattan last night. I'm in town for a conference, so I don't have much time to write about the experience (in fact, I'm sitting in a session trying to listen to a speaker posting this via a wireless network), but there are many articles about them on their web site. I have always found that New Yorkers (and Parisians for that matter), despite their reputations, are actually very friendly, and these two are extraordinarily so. My wife and I stood on the street and we just chatted with them for the better part of an hour. If you buy into the theory that wealth is measured by how many friends you have, Liz and Bill are the richest people I know.