York _ April 10, 2009 Circuits SiFrom the Desk of David Pogue Cameras With Time-Machine Powers By DAVID POGUE I had so much fun reviewing the Casio EX-F1 last year. Here's what I said about it: "The Exilim EX-Fl ($1,000 list price) is the world's fastest camera. It can snap -- are you ready for this?