Here's a 5-minute introduction to IBM PowerSC, a security solution that addresses the concerns that can arise when it comes to virtualized data centers.  This video is presented by Shawn Mullen, an IBM Senior Technical Staff Member.  From the original YouTube post:

BM® PowerSC provides a security and compliance solution optimized for virtualized environments on IBM Power Systems™ servers, running IBM PowerVM® and IBM AIX®. Security control and compliance are some of the key components needed to defend the virtualized data center and cloud infrastructure against ever evolving new threats. The IBM business-driven approach to enterprise security used in conjunction with solutions like PowerSC make IBM the premier security vendor in the market today.