Understudy. Fill-in. Cover. Whatever you call it, that’s me at the moment—pinch-hitting for editor-in-chief Victoria Gomelsky, who’s enjoying the last moments of her maternity leave. She’ll be back on this page next issue, just in time for our fall fashion spectacular and Las Vegas run-up. That’s right: Las Vegas run-up. As I write this, Vegas jewelry week is a mere three months away. And since I’ve only been to JCK at Mandalay Bay, I’m superexcited to see the show in its new-old home, the Sands Expo and the Venetian…and to try the push-button Champagne service at Rosina in the Palazzo hotel. To help you plan your JCK Las Vegas trip, JCK contributor Matt Villano, our resident Vegas expert, rounded up the hottest bars, restaurants, and recreational spots (in case you need to do some ax throwing) in “Strip Planner.” Of course, Vegas isn’t all about cocktails and ca