I just read a nice book by Marc Abélès: Les Nouveaux Riches Un ethnologue dans la Silicon Valley. It's in french. The author is a french ethnographer who reports us his study of dot.comers in the Silicon Valley who turns themselves from the "stingy valley attitude" to philanthropy. The most interesting part in this book is not the accounting of how those people live but the way they give meaning to gift plus the definition of venture philanthropy (i.e. the use of a business framework in philanthropy).