Last night, Conan O'Brien took over from Jay Leno as the host of the Tonight Show.I think one of his first guests should be his mother, Ruth O'Brien, whom I got to know while working at Ropes & Gray in Boston.The second woman partner at the firm, she was welcoming and helpful to new attorneys at the firm.She also, not surprisingly, has a great sense of humor.Incredibly, she raised six children while pursuing her legal career--her path from Worcester to Vassar to Yale to Ropes & Gray is detailed in this fascinating account from the Stanford Women's Legal History Project.I remember Ruth remarking one day that one of her sons was starting a late night television show in New York--and how they hoped it would work out for him. We now know that it did--congratulations!