IGN has surprisingly kicked up a summary of the new information that can be gleaned from the Fallout: New Vegas preview in the latest issue of Game Informer magazine. On gambling and currency:
Once you reach downtown New Vegas there are a host of casinos where players can try their hand at slots, blackjack, and roulette. So far Bethesda has revealed six casinos including Lucky 38, The Strip, Gomorrah, Vault 21, The Ultra-Luxe, and The Tops. Each of these locations has their own house rules, so you'll get a different gambling experience depending on where you play. There are also three different currencies to match the warring factions in the game so along with bottlecaps you'll be trading between coin and NCR dollars when you hit the casinos.