I haven't looked into this, but I guess I might as well ask here...
I am an iOS developer, so I have used preview OS builds before release (iOS 5 for example) in the past. But do I also have access to Mountain Lion Developer Preview? Or do I have to purchase the Mac developer profile as well?
And if I do have access, is there a way to revert back to Lion if I don't like ML or it's buggy for some reason? I do have a Time Capsule with Time Machine set up, if that makes a difference.
EDIT: Nevermind, I found it (didn't think I had access to the site at work).
Access to OS X Mountain Lion
You must be enrolled in the Mac Developer Program to access the development resources for OS X Mountain Lion.