Walking the marbled halls of some of Las Vegas' lavish shopping centers, amid decor that is strictly over-the top, I stopped several visitors to ask if they would do their part for the retail community and spend like they'd never heard the words "mortgage foreclosure." But this small, random sampling wasn't a carefree group. Most responses hued to the "I'm being conservative with my dollars" mantra, and the salesperson-to-shopper ratio in luxury stores bore that out. Sales associates said the climate was among the worst -- if not the worst -- in their experience. And there were a lot of rueful comments from visitors about making that big score in the casinos. Hope springs eternal, especially in Vegas.