You can use MS Office 2010 with free-of-charge for nearly a year. The preview won’t expire until Oct. 31, 2010. The public download is available from the Microsoft site, on this page.
Office 2010 is the first Microsoft suite to be offered in both 32- and 64-bit versions.
The Office 2010 Beta site had listed three different versions that would be made available to users: Professional Plus, and the to-be-sold-at-retail Office Home and Business, and Office Professional. Microsoft has set the minimum requirements for the beta as a 500MHz or faster processor; 256MB or more of memory; 3GB of free hard drive space; and Windows XP Service Pack 3 (SP3), Windows Vista SP1, Windows Server 2003 R2, Windows Server 2008 SP2, or Windows 7.
This is very exciting!! I might give it a try for this new version.
Source: Computer World