Microsoft has apparently starting sending out invitations to Mac users for Microsoft Office 2011 for Mac. The software is currently at Build 100709 and includes several new features including new Office Web Apps and Co-Authoring Tools, a newly designed interface with “Office for Mac Ribbon”, .PST Import support for Outlook for Mac, and more.

Let us know if you receive an invitation and what you think of the beta when the next beta testing cycle begins.

From Microsoft:

“The Office for Mac 2011 beta is closed to the public, which means ALL Office 2011 tools and features are confidential and proprietary to Microsoft. By participating in the beta, you consent to a non-disclosure agreement which includes all forms of communication including print, broadcast, electronic, internet publications, social media networking sites, blogs, and verbal disclosure. The NDA will not lift until the product is public later this year. We will update on timing closer to the date.”

[via 9to5mac]