Paypal, aside from being a huge financial success, has spawned a ton of really interesting companies and people doing interesting things (Slide, Yelp, LinkedIn, YouTube, etc) in a fairly short period of time. In my estimation, it appears to be one of the best Silicon Valley “family trees” since Netscape. I am curious to hear who people think might be the next great “family tree” in Silicon Valley. Facebook? Google? To clarify, great “family trees” are ones that spawn another generation of great start-up companies.