Fallout: New Vegas is released in the US on October 19th 2010. The EU release will follow couple of days later, on 22nd of October (damnit, it'll be a long week for me!).
The Fallout: New Vegas Collector's Editions have been sold out long ago, as a lot of people pre-ordeded F:NW after June. The ones that are left are going as high as $150. There has not been announcements that there would be more collector's editions available, but you never know. The bonuses in the CE are great, but not so great that it'd be worth it to pay 100 bucks more for it.
Fallout: New Vegas is available for XBox 360, PS3 and PC DVD
Anyway, as said, Fallout: New Vegas has been released this week, and I'm getting mine on Friday 22nd. You lucky US bastards better buy the Fallout: New Vegas as soon as you can, so you can brag about it for couple of days :)
p.s. My free Fallout 3 Perfect Character -guide has been read over 85 thousand times, and if the character creation, S.P.E.C.I.A.L. and skills remain the same, the guide will be golden for F:NW as well!