A coffe-shop chain welches. Simon sues for $10 million. Did she sue because she's vain? Does she believe welching isn't the way it should be? Is she too sensual for the coffee-chain? Does she reveal her inspiration for "You're So Vain"? Well, yes, in a way, she does. "Lush, Lanky and Litigative" is the newest, freshest, most thorough