In this issue: COMMENT "Gulag Lite", by David Remnick: The trials of Mikhail Khodorkovsky. THE FINANCIAL PAGE "Groupon Clipping", by James Surowiecki: What's the right price for the hot new thing? THE TALK OF THE TOWN "Art Stalker", by Jane Kramer: Robin Heidi Kennedy's devoted thief. MEDICAL DISPATCH "Mother Courage", by John Colapinto: The Duchenne campaigner. A REPORTER AT LARGE "Village Voice", by Peter Hessler: Reinvigorating the Peace Corps. THE CURRENT CINEMA "Roundup", by David Denby: Reviews of True Grit, The Company Man, Somewhere and The Tempest.