i think there should be multiplayer in fallout new vegas (like the multiplayer in borderlands) cause that would be cool.

Nope, it's been confirmed that New Vegas is single player only.

The current version of the engine Obsidian is using cannot support multiplayer with a lot of work.

Please use this topic to discuss on-line play. Thank you.

http://www.gamesas.com/index.php?/topic/976152-fallout-multiplayer-discussion-thread/