http://www.youtube.com/watch?v=NBAv5DpFf5k
The ability to charge it while using it from a usb is about the only thing I see the only one having over an MX Revo.
Speaking of which, my MX revo is the only thing I really miss from my PC set up at home atm.
I mean, am I missing something?
English:
http://www.youtube.com/watch?v=QAY-z2Ab114
... I am a little sad to see shitty reviews say that you have to go into setpoint to change the DPI on a razer. You can set a key on the mouse to handle that. That second video also says that the mamba is more customizable? ... the Revo has 11 buttons total, 9 of which can be set to do anything you like. The orig mamba looks limited to 6 buttons with only 3 customizable.
I think I understand why razor has a new mouse. But 12 buttons on the side seems a little much.
With my revo, I had a hard time using 5 buttons with just my thumb. 12 seems insane.
Edit:
http://www.youtube.com/watch?v=HWJ1AyP5i44&NR=1
They have a new one... but they removed the thumb wheel

I liked the rest of the improvements.