"Orwell Now" is an evening of discussion and rebuttal by writer Christopher Hitchens and other George Orwell scholars for the debut of John Reed's Animal Farm parody follow-up novel "Snowball's Chance." Mr. Hitchens is scheduled to appear at Cooper Union with Simon Schama, James Miller and the New Yorker writer Bill Buford for ''Orwell Now,'' a symposium presented by the PEN American Center, all were prepared to discuss their view of Orwell and Orwell's politics. Mr. Hitchens will also discuss his new book "Why Orwell Matters."