In past Microsoft Office 2010 Technical Preview was leaked twice and few days back Office 2010 Beta was made available to TechNet and MSDN subscribers and now its available to public. You can get it for FREE using below given link

What’s included in Microsoft Office 2010:

• Microsoft Word
• Microsoft Excel
• Microsoft PowerPoint
• Microsoft Access
• Microsoft Outlook
• Microsoft OneNote
• Microsoft InfoPath
• Microsoft SharePoint Workspace
• Microsoft Publisher
• Microsoft Communicator

System requirements for Microsoft Office 2010:

• 500 MHz 32-bit or 64-bit processor or higher
• 256 MB of system memory or more
• 3 GB of available disk space
• 1024×768 or higher resolution monitor
• DVD-R/W Drive
• Windows XP SP3 , Vista SP1 , Server 2003 R2 , Server 2008 SP2 , 7

Download Office 2010 Professional Plus Beta

http://www.microsoft.com/office/2010/download-office-professional-plus/default.aspx

Office 2010 beta is set to expiry on October 2010 and requires online activation. The size of Office 2010 Beta 32-bit & 64-bit installer is around 700 MB.