"I have a life that is rich in experience, and is now rich in spirit." This is how Bob DeMarco opened the new year on his blog. At 61, DeMarco is sole caretaker of his 96-year-old mom, Dotty. At one time he was an institutional salesman of derivatives, futures, options and mortgages; at another time he was chief executive of a small software company. He was once married and is now divorced. But according to Jane Gross, DeMarco always knew he would drop it all to care for his mother when the time came. That time came eight years ago.