Our breakdowns are too systemic to be solved by “charity” but the idea of these new millionaires embracing real social entrepreneurship is a good one. From Open Forum–On Facebook IPO Facebook is going public on Friday. The company’s market valuation at the end of its first day of trading could top $100 billion. Instantly, scores of Facebook employees will become millionaires. But what happens the following day? These newly wealthy folks will eventually have to ask themselves an important question: What should I do with this money? As a couple who was fortunate enough to face that question when we…