Microsoft is doing its best to tempt users to Office 2011 for Mac, despatching invitations to join the Mac 2011 beta testing cycle to some users. The software is apparently currently at Build 100709. Invitations are being despatched at this time. There’s several new features to the new productivity suite, as detailed here. As you may expect, restrictions apply. Sign up to the beta if you can promise and agree as follows: “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.