I recently submitted a conference proposal on cloud computing.

Google said in a blog post
the outage came down to a simple traffic jam at an Asian data center.
The search giant described the situation by using the analogy of a
large number of airplanes being rerouted through one airport that was
not equipped for a massive influx of traffic. But in Google’s case, it
wasn’t airplanes looking for a place to land; it was cloud-based data trying to stay up in the sky. — PC World