"Some examples of these unofficial data flows are USB sticks or other portable data storage devices, MSN Messenger or other online messaging software, Gmail or other online e-mail services, Google Docs or other online document sharing and Skype or other online VOIP software, and also other less straightforward products self-developed Access databases and self-developed Excel spreadsheets and macros."

Are you kidding? Someone using Skype or developing Excel macros is considered Shadow IT!? People have been doing that for years and 99% of them were never considered IT folk..Shadow IT is more sophisticated than a user running a desktop app.

It's more like signing up for cloud services and running what could be considered enterprise software like a database or just about any app you'd find operating entirely inside the enterprise walls