The iPhone SLR Mount turns your iPhone into a DSLR

If you can't decide to get an iPhone 4 maybe this will help you make your decision. The iPhone SLR Mount lets you mount your Canon EOS or Nikon SLR lenses to your iPhone 4 giving your phone powerful depth of field and manual focus. Do note that the images will be upside down. Rotate them using a photo editing software.

(via Boing Boing)