There are currently only three downloads on the topic Office365 on download.microsoft.com
But if you are in to Office365 they are worth reading.
Office 365 Beta Service Descriptions
These documents provide a detailed description of the features and functionality of Office 365 services currently in beta.
FOPE Office 365 Beta Documentation
FOPE Office 365 Beta documentation, including explanations of new FOPE connector features available to Office 365 Beta participants.
These documents provide an overview of the features and benefits of the Office 365 services currently in beta.