I have not got this information to hand but I am looking into this and hope to get back to you before too long.
Microsoft Outlook 2010 will be supported in version 5.2.
I have read your post.
We hope that the McAfee SaaS End Point protection version 5.2 will support the Microsoft Outlook 2010 version.
Please bear with us. The 5.2 version will be released in a couple of weeks time.
The release notes for version 5.2 are out.
Under the known issues and incompatibility, It clearly states that version 5.2 is not going to support Windows 2008 R2 and the Outlook 2010 Add in.
So, I guess the answer is :- No, SaaS Endpoint Protection still does not support the Outlook 2010 add in.
Also see KnowledgeBase article KB60533 - Supported environments for SaaS Endpoint Protection.