BLACK HAT Neil "Grifter" Wyler is spending the week "looking for a needle in a needle stack," a task he'll perform from the network operations center (NOC) that powers the Black Hat security conference in Las Vegas. The Register popped in to check it out. We found the NOC in an unremarkable meeting room deep inside the Mandalay Bay hotel. Conversations inside are quiet, because the volunteers play a mixture of techno and metal, and beam muted hacking movies onto a screen in the background - Catch Me if You Can when this hack visited. REG AD We're looking for a needle in a needle stack Sofas, the odd beanbag, a couple of plush mascots (a monkey and an inflatable sheep) provide places to crash. The volunteers work five or six hour shifts – with time off to go to training sessions and…