We just stumbled upon a Youtube clip posted by a user named Digicam95. The video demonstrates that when you're viewing photos via PS3, the system can actually detect the faces of individuals present. When viewing the video, notice that when slideshow is activated the system always zooms in on the face of the sole person present - no matter where he/she is in the picture. And when multiple faces are present, the system zooms in and scans the photo from side to side making sure you see every face, and not just one. There are a few more quirks demonstrated in the video, so take a look.