I have been receiving some emails from developers who can't wait to start playing around with Office "12" and that want to know how to enroll to the Beta 2 program. I don't manage the program, but I just talked with someone from the Office "12" Partner Readiness Team and here's what you have to do:
For Beta 1:
Office 12 Beta 1 is a limited, non-public beta for partners who have achieved the Information Worker Solutions Competency status. You can learn more about the Information Worker Solutions Competency by visiting https://partner.microsoft.com/global/competency/iwsolutions/40010101
For Beta 2:
To register for Office “12” Beta 2, available later this spring, please go to http://www.microsoft.com/office/preview/default.mspx and click the “register now” link at the top of the page.
I encourage you to register and start experimenting with Office "12". I have been playing around with Office "12" for some time and every day I get surprised while I discover new features.
Today I was working with Excel "12" and I made some demo graphics that present some MSDN traffic results. I really like the professional and cool look that you can get when you are building charts and they are quite easy to customize.
So if you want to start playing around with Office "12" too, follow the previous instructions and I am sure you will have a blast!