The Intercloud is the most exciting thing since the internet. Cloud Computing makes perfect sense economically so cloud computing is destined to grow. The problem with clouds is they operate for the most part in isolation. These clouds will eventually need to be able to talk to each other. That's where the intercloud comes into play. To read more on this subject just follow the links below.
The First International Workshop on Cloud Computing Interoperability and Services
InterCloud vs. Internet
InterCloud vs. Internet: What’s Missing in Cloud Computing?