If
you want to test Microsoft Office 2010 Beta you grab free product keys
orlicense keys for Microsoft Office Professional Plus 2010, Microsoft
Project Professional 2010, and Microsoft Visio Premium 2010 on Microsoft
website. The product keys are used to activate Microsoft Office 2010
Beta when installed on your computer.
Actually
there are two type of activation methods for Microsoft office 2010,
using multiple activation keys (MAK) and using key management service
(KMS). Multiple Activation Key (MAK) is used to activate fewer than 50
computers. Key Management Service (KMS) for activate thousands computer
at the same time. On this Post I only provided Multiple Activation Key.
How to get activation keys for Microsoft office 2010 beta ?

Once opened the page you will see the product key like this:
How to activate Microsoft Office Professional Plus 2010 Beta using MAK product keys
You can activate your Microsoft Office 2010 beta by entering your product key. You can use one of the 3 options to enter the product key. For more info how to activate Microsoft Office 2010 using your product key you can open this website.
Microsoft Office Professional Plus 2010 (Retail Edition)
English 32-bit (x86): X16-32250.exe
English 64-bit (x64): X16-32213.exe
Here the product key (MAK keys) for Microsoft Office 2010:
Microsoft Office Professional Plus 2010 :
- 22HGX-728MX-BBWX9-7BB8X-J96B4
- YKBBY-23WRJ-TQTMD-J3BQ7-8RM6H
- 764VJ-6RKF6-2DDCF-76WW6-YC6VT
- V9MTG-3GX8P-D3Y4R-68BQ8-4Q8VD
- FFP4K-XD2D8-YWMBP-F696F-T29F9
- YGDK9-782RK-3J37G-JVPR9-GDP8H
- YF79C-7Y4B4-PGM89-6BKGJ-46PBT
Microsoft Project Professional 2010 : CQYRY-3KBR3-JW34C-VGH7M-MQM49
Other Keys MAK keys for Microsoft Office 2010 beta
2PWHY-KT4X6-96PYW-XQR7V-HW2W9
YF79C-7Y4B4-PGM89-6BKGJ-46PBT
7XD2X-JWJ94-BCHBW-W9WXP-J2WPT
Microsoft Visio Premium 2010 Beta :
P33XK-G7GK2-Y742B-8HCY6-RX3K8
Microsoft Project Professional 2010 Beta :
FJDHB-D2KBB-XJK2Y-FCWGH-63J23
Microsoft office 2010 beta can be downloaded here : http://www.microsoft.com/office/2010/en/default.aspx