Mike Nash is Microsoft's Corporate Vice President of the Security and Tools Business Unit.  He does a monthly webcast he calls “Security 360”.  He discusses various security issues and recommendations.

On January 17th, Mike will be discussing Mobile Security. 

 http://msevents.microsoft.com/CUI/WebCastEventDetails.aspx?EventID=1032287482&EventCategory=2&culture=en-US&CountryCode=US

I'd really encourage you to attend this web cast!  It should be excellent!