Infrastructure as a Service providers make a very compelling argument
for businesses to stop running their own data centers and simply
purchase server capacity on-demand and scale up and down as needed. “Cloud Computing: Moving to IaaS” is a deep dive on IaaS strategy and best practices. The special feature page on ZDNet includes these articles:

The joint TechRepublic-ZDNet feature also includes research based on recent surveys of companies that have implemented IaaS and a free eBook that compiles articles on developing a cloud strategy (registration required).