From Gizmodo:
"You are looking at Apple's next iPhone. It was found lost in a bar in Redwood City, camouflaged to look like an iPhone 3GS."
What's new:
• Front-facing video chat camera
• Improved regular back-camera (the lens is quite noticeably larger than the iPhone 3GS)
• Camera flash
• Micro-SIM instead of standard SIM (like the iPad)
• Improved display. It's unclear if it's the 960x640