Ah nevermind, on the Fallout forums the PS3 users haven't been able to get the latest DLC Honest Hearts to Fallout New Vegas because of PSNstore so I thought you were because of Honest Hearts not being available for you to purchase.
Heh, kay. Not gonna buy New Vegas? While pretty much the same in gameplay and graphics it has it's tweaks and new gameplay mechanics to make it more interesting. Only thing you'll be disappointed in might be exploration and dungeon crawling. Far less of that in New Vegas, but it has far more characters, quests, factions, dialogue and others things to make up for it. And the game has dropped in price too IIRC. It's DLC's are also pretty good and worth buying. (I don't like Honest Hearts too much but I'm in the minority of disliking it)