Here is my update. I have since installed and SSD drive and love it! I used the v14 extras to install ML on my 6520.
Sleep was not working
Web cam was not working
battery indicator not working
I installed the beta EDP app and got Sleep to work! very cool. I don't think the battery indicator works with any of the 3 options, but I will check again.
Webcam works in iMessage, but not in Facetime or PhotoBooth, I can live with this.
Trackpad works, but no gestures or scrolling. And the joystick is terrible. I like a mouse, so i can live with this as well.
If we could get the battery indicator to work i would be willing to call it complete.