Not everyone is impressed that Madonna has re-invented herself, reports MSNBC.com. Rabbi Shmuley Boteach, the former friend and adviser to Michael Jackson, has attacked the Material Mom, calling her a "slut" and a "vulgarian." In a startling essay for SomethingJewish.Co.UK, the Rabbi blasts Phillip Berg, the head of the Kabbalah Centre, for letting the Material Girl be the religion's highest-profile spokesperson. "Earth to Phillip Berg: Do us all a favor and dump Madonna as your principal spokesperson," Boteach writes. "Sorry to be so crass, but Madonna is a slut. Yes, she may sing, and she may dance. But she is...