Mine has been unofficially named Dorothy.
The Story: I first fell in love with Dodge Ram when I saw the red Ram in the movie Twister. Ever since then, I've loved the movie and loved RAM. The tornado analysis device used in the movie is called Dorothy. Also, the movie named it Dorothy in reference to Dorothy and Todo from the Wizard of Oz, seeing as they got sucked up in a twister and were not in Kansas anymore. There will be other tornado themed accents on the truck, such as a tornado image on the engine cover. The name Dorothy will be painted/vinyl'd onto one or two tasteful and subtle spots.
Call it lame if you will, but that movie is the reason I love RAM and I find it fitting to name the truck after something in not just one, but two movies involving twisters.