Yes. Bethesda has confirmed that they are in the planning stages of "Fallout 4". Nobody is sure if this is the exact title of the game, and more information was said to be released soon.
Fallout New Vegas is all one game.
No, you can't get married in Fallout: New vegas, but you can have sex in the game :)
fallout new Vegas will be on PlayStation 3 and Xbox 360
A new game.
As far as other people know. Probably. Because they have so many people who like Fallout New Vegas, that if they make another one; everyone would want it. Hope that will get you exited! :)
They most likely will, though Obsidian is making Fallout: New Vegas (which is not Fallout 4, it's just another game in the Fallout world)
"Fallout: New Vegas" is projected to come out sometime in 2010.
Yes.
Yes, called Fallout New Vegas. It's 3 or 7 years after Fallout 3. There will also be the NCR which are the new republic of California (which are from the previous fallout games). Go to ign and check it out or fallout wiki.
If by you mean a new Fallout game the yes, Fallout:San Francisco
New Vegas is not an expansion pack for Fallout 3 or part of the game! Fallout: New Vegas and Fallout 3 are separate games. As for "how to get there", you can purchase it almost anywhere retail video-games are sold.
I just beat the game and there is no new game plus.