The Offfice365 Trust Center provides information on our new Security and Privacy controls and information http://www.microsoft.com/en-us/office365/trust-center.aspx#fbid=rgEaWS1YYOA

In addition,The Cloud Security Alliance published the Cloud Control Matrix, to support consumers in the evaluation of cloud services and to identify questions prudent to have answered before moving to cloud services. In response to this publication, Microsoft has created this document to outline how we meet the suggested principals and mapped them to the International Standards Organization (ISO) 27001:2005 and ISO 27002. With this standardized response we would like to empower customers with in-depth information to evaluate different offerings in the market place today.

http://www.microsoft.com/download/en/details.aspx?id=26647