Michael Dell is adding one more bronco to his stable, email backup service MessageOne. The company is ho-hum — boring enterprise software; the founder, not so much. That's because his last name is also Dell. As in Adam Dell, Michael's younger brother. That's not the only part of this deal that's staying in the family: The $155 million addition will kick $12 million back to Michael, who invested in MessageOne. He says his profits will go to charity. Adam will walk away with $1 million, and the brother's parents, another $500,000.