In reply to David H. Deans.

David,
You are spot on and I so wish that more IT leaders would see the situation exactly as you outlined ... shadow IT represents a super opportunity for them to gain insight to the needs and preferences of the lines of business, then act to enable wise choices for SaaS and IaaS. IT can take a leadership role here, using the cloud usage data to transform into a broker of services for lines of business. Why do you think so few IT leaders see this as an opportunity?