An attorney for Sarah Palin has delivered a letter threatening legal action against an anti-Palin blogger who was the source of a divorce rumor that the attorney for the former Alaska governor called "categorically false." Publication of the letter at a Web site that repeated the rumor has uncovered circumstantial evidence that the anti-Palin blogger "Gryphen" is a kindergarten teacher at an Anchorage elementary school.... CNN stringer/anti-Palin blogger Dennis Zaki published ... a copy of a letter from Palin attorney Thomas Van Flein, ordering "Gryphen" to retract the allegations -- calling them "complete fabrications, false and defamatory" -- or face...