IT'S A BIG, THIRSTY WORLD, and people will drink just about anything. But will they share? Equipped with nothing more than a credit card and a modem, we thought we'd see. Our mission: to capture the yetis of beverage alcohol, tipples so exotic that you won't find them in any liquor store in America. [paragraph] Now, it's one thing to locate your mahua. (You know, from India? Distilled from butternut-tree blossoms? Faint odor of mice?) It's another to get somebody to ship it to you. Same goes for Brazilian tiquira (tapioca based), Venezuelan miche (from sugarcane and herbs), Mexican raicilla (a smoky bootleg mescal), Polish starka (that's cask-aged vodka), and Nepalese Gaule ...