Thanks, all, for your answers.
@Justin: I agree. Not looking to cheat the system.
@Melissa: Yes, I tried to contact Branson through various Virgin enterprises. I have had good luck going through websites to reach people who are household names only in their niche. That's how I got both Cynthia Kersey (Unstoppable/Unstoppable Women) and Frances Moore Lappé (Diet for a Small Planet) to write guest essays for Guerrilla Marketing to Heal the World.
@5 Star: I certainly don't agree that you need to be a billionaire in order to talk to billionaires. I've connected and partnered with many millionaires without being one. I am not acting out of naivete but redefining our sense of what is or isn't possible; the TED talk gives some good perspective on this. Here's the key: these problems all boil down to resource issues: when we look at who controls resources, how they're distributed, how they're used, and what their impact is, we actually know how to solve them. I invite you to spend 15 minutes watching it and see what you think.
@Rob: "They want to find new and innovative ways to achieve their mission (global health and poverty as well as overhauling the US education system" Yes, that's exactly what I'm offering: a new and innovative path to convince business to take the lead on social issues.