Today Starbucks all over are closing for 190 caffeine-free minutes. The blackout (hold the cream and sugar) is set for 5:30pm, so be prepared for a temporary Venti Soy Latte drought. Even more disturbing for Starbuckistas, however, is the sign above. The "Dear John" letter is from an 8th Street outlet (between 5th and University) and addressed to its loyal patrons. A closing Starbucks? Creepy, indeed. As for the 8th Street regulars, looks like......