A Friend of Unfair Park who's thinking of spending the Fourth of July tea-partying out at Southfork Ranch -- "but only for Mickey Dolenz," she writes, and I smell fresh-baked sarcasm -- directs our attention to a forthcoming Dallas appearance by Ann Coulter, who'll be at the Fairmont Hotel on August 15 to help raise funds (and fun!) for the Revolution PAC. Ducats ain't cheap, even for the cheap seats, which begin at $220 and run all the way to $440 for chairs closest to the stage, where you can