According to a poster at NeoGAF, ZeniMax has applied for three new trademarks, likely connected with upcoming Fallout: New Vegas add-ons. Two of them, Honest Hearts and Lonesome Road, were already hinted at in the in-game graffiti. The trademarks are:

• Honest Hearts
• Lonesome Road
• Old World Blues

We'll let you know when we know more about these add-ons!