2010 iPhone grooves

Lots of reports today of the discovery of a future iPhone (gizmodo, engadget, etc.).  There's been a lot of discussion on the authenticity of the photos and the likelihood that the device really is the next iPhone.  With extra focus on several grooves on the case.  My guess:  this will make it easier to mount accessories to the bottom.  And, for those accessories that need a little more security, there is a groove on top.  I guess we'll see in a couple months...