Office 365 is a cloud based implementation of Microsoft’s functional and collaborative Office Suite. It is designed to also interact with mobile devices as well as providing “thin client” capabilities for business PCs.   Below are some key resources: 

Office 365 – Home Page
http://www.office365.com/
http://www.microsoft.com/en-us/office365/online-software.aspx

Office 365 – Press release
http://www.microsoft.com/Presspass/press/2011/jun11/06-28MSOffice365PR.mspx

Office 365 – Overview
http://www.microsoft.com/en-us/office365/what-is-office365.aspx

Microsoft Online Services Trust Center Information
http://www.microsoft.com/online/legal/v2/?docid=21&langid=en-us

Office 365 – Articles
http://www.marketwatch.com/story/microsoft-launches-cloud-based-office-365-2011-06-28
http://www.eweek.com/c/a/Desktops-and-Notebooks/Microsoft-Launches-Office-365-881968/

Office 365 – Product Reviews
http://www.infoworld.com/d/cloud-computing/office-365-vs-google-apps-the-infoworld-review-447
http://www.channelregister.co.uk/2011/06/28/office_365_v_google_apps/
http://www.pcmag.com/article2/0,2817,2383731,00.asp
http://www.guardian.co.uk/technology/2011/jun/28/microsoft-office-365-review