Reason #10: Xbox 360 Doesn't Have a Killer App
Reason #9: Dual-Screen and 1080p Support
Reason #8: Hefty Expandability / Connectivity Options
Reason #7: You Can Still Pre-Order
Reason #6: Seven-Player Wireless Support
Reason #5: The HD IP Camera
Reason #4: Full Backwards Compatibility
Reason #3: Stronger Japanese Developer Support {Konami, Capcom,Namco etc}
Reason #2: Metal Gear Solid 4: Guns of the Patriots
Reason #1: The Blu-ray Player
more here
http://ps3.ign.com/articles/668/668446p1.html