The Fallout: New Vegas Lonesome Road downloadable content has been delayed, according to the game's Senior Producer Jason Bergman. Bergman announced that due to circumstances beyond his control, Lonesome Road won't be out this month as originally anticipated.
"This isn’t due to any major issue with the code or content, but there are lots of factors involved in releasing these things, and one of those is causing us to slip past our intended release date," Bergman said.
He doesn't give us a date on when we can expect the DLC, but does mention that they'll release it, along with a couple of other interesting Fallout: New Vegas items, in the near future.
In the meantime, you can check out some of the Fallout: New Vegas Lonesome Road achievements to get you more pumped for the DLC.