Junaio was recently released on the IPhone.  It is another AR Browser like application, but allows you to place objects in the scene.  In the video on the link the women places a dinosaur in the scene next to the Golden Gate Bridge.  She was even able to scale it using gestures, which is pretty cool.  Then she posts it to Facebook, and when her friend looks at it he jumps back as if he is startled to find a dinosaur in the picture.  I'd be concerned with the friend's ability to distinguish low res 3d visuals from reality if this were true.  My favorite part of the video is when she using the AR browser application to find information about the square she is standing in.  She pans around and touches an icon to find out that there is a coffes shop in the square.  When she puts the camera down the coffee shop is RIGHT IN FRONT OF HER.  If we need an AR Browser to tell us that there is something right in front of us then...well either these are tears of laughter streaming down my face, or I'm really really sad for the future of humanity.  :).

Anyway, I'm mostly jealous that I can't try out the application because my IPod touch doesn't have a camera.  I too want to stand there and take pictures of strangers to put pumpkins in their hands.  It looks like a really well made app, and they've put some effort into it.  Wish I had their skills...  At present I'm struggling with my app.