In a juicy artworld sideshow to the economic meltdown, Lawrence Salander, prominent NY art dealer, was arrested thursday on charges that he cheated his clients out of an alleged $88 million. That’s million, not billion, and while Mr. Salander isn’t in the Madoff league, the 100 counts of grand larceny, falsifying business records, scheming to defraud investors, forging documents and perjury give plenty of scope for similar "I can’t believe it/I knew it all along" head-shaking.