i have been playing about in flash trying to get the idea onto the screen, the problem i had was figuring out the code for the images to move so it gives the impression that it has depth, i initially started of with the images both moving on the x axis and the y axis so you had the movement of your head to look around, but it didn't feel right and the images didn't blend very well on the y axis, so they stayed on the x axis and i played about with them till it looked right.