Thanks to the ways of del.icio.us, I found a page where Christopher Phin explains how to recreate on Photoshop an effect you get by using very expensive tilt-shift lenses, like the ones this guy uses. So I decided to give it a try, and here is the outcome:

This one came out pretty well, the sky seems flat enough so it doesn't look to real, and the eye being so low makes a good excuse for such a narrow dof.

This one is my favorite. It's tilted down enough to have a believable pov and the clean road and even spaced cars, along with the strong grass makes it all look very artificial.

This last one is a bit risky. Also from eye level, but on a common street. The dof works great here, and so does the strong light. Love the out of focus trees, very model-like, and the pavement.