This only took several weeks longer than it was supposed to.
Source: http://bethblog.com/index.php/2011/05/03/details-on-honest-hearts-old-world-blues-and-lonesome-road/
Bethblog said:BETHESDA SOFTWORKS REVEALS DOWNLOADABLE CONTENT PLANS FOR FALLOUT®: NEW VEGAS
Three Additional Add-on Packs Releasing in Coming Months 
for Xbox 360, PlayStation®3 system and Windows PCs
May 3rd, 2011 (London, UK) Bethesda Softworks®, a ZeniMax® Media company, today announced three downloadable content packs will be released in the coming months for Fallout®: New Vegas. The three packs will be released simultaneously for the Xbox 360® video game and entertainment system from Microsoft, PlayStation®3 computer entertainment system, and Windows-based PCs.
Honest Hearts, Old World Blues and Lonesome Road will further expand upon Fallout: New Vegas. Fallout: New Vegas takes all the action, humour and post-apocalyptic grime and grit of this legendary series and raises the stakes.
Available on May 17th for Xbox 360 and Windows-based PCs and May 18th for PlayStation®3, Honest Hearts takes you on an expedition to the unspoiled wilderness of Utahs Zion National Park. Things go horribly wrong when your caravan is ambushed by a tribal raiding band. As you try to find a way back to the Mojave you become embroiled in a war between tribes and a conflict between a New Canaanite missionary and the mysterious Burned Man. The decisions you make will determine the fate of Zion.
In Old World Blues, releasing in June, you will discover how some of the Mojaves mutated monsters came to be when you unwittingly become a lab rat in a science experiment gone awry. Youll need to scour the Pre-War research centres of the Big Empty in search of technology to turn the tables on your kidnappers or join forces with them against an even greater threat.
Lonesome Road, available in July, brings the couriers story full circle when you are contacted by the original Courier Six, a man by the name of Ulysses who refused to deliver the Platinum Chip at the start of New Vegas. In his transmission, Ulysses promises the answer as to why, but only if you take one last job a job that leads you into the depths of the hurricane-swept canyons of the Divide, a landscape torn apart by earthquakes and violent storms. The road to the Divide is a long and treacherous one, and of the few to ever walk the road, none have ever returned.
Reviews of Fallout: New Vegas have called the game as an utterly essential purchase (MSN UK) and as addictively, rambunctiously fun (Entertainment Weekly). The Associated Press awarded it a 4 out of 4 stars and said Bottom Line: Its a Blast, while GameSpy gave it 4.5 out of 5 stars and called Fallout: New Vegas one of the best games of the year.
All downloadable content for Fallout: New Vegas will be available for download on Xbox LIVE® for 800 Microsoft Points, the PlayStation®Network for 9.99 / £7.49, and both Steam and Direct2Drive for 9.99 / £7.49.
For more information on Fallout: New Vegas, published by Bethesda Softworks and developed at Obsidian Entertainment, including the games downloadable content, please visit HYPERLINK http://fallout.bethsoft.comhttp://fallout.bethsoft.com.
Source: http://bethblog.com/index.php/2011/05/03/details-on-honest-hearts-old-world-blues-and-lonesome-road/