If you are interested in trying out Mac OS X Yosemite, but you aren’t one of the 9 million registered developers already gaining access to the Beta today, you can sign-up on Apple’s website today for your chance to be included in the Beta program. The only catch is that you have to have an Apple ID and be one of the first 1 million individuals to sign up on their AppleSeed registration page.
I was able to sign-up a little over an hour ago and it was easy and painless. From Apple
OS X Yosemite will be available this fall. The OS X Beta Program lets you take part in shaping it by test-driving pre-release versions and letting us know what you think. Your comments will help us make OS X better for all Mac users. Sign up today, and the beta software will be available for you to install soon.