Recently my Dad asked me "What the heck is Cloud Computing"? Knowing I worked at Sun, he thought I'd have all the answers.... I explained that companies often found themselves in this scenario: they have ever changing needs and often have to quickly scale up for a new project or try to plan for the future. Imagine doing this right on the Web, without having to invest in new infrastructure, train new personnel, or license new software. That's cloud computing in a nutshell. With Sun's open platform it makes it about as easy as possible. And Sun's been doing this for years...we used to call it Grid, and then the rest of the world caught up with us.
http://www.youtube.com/watch?gl=DE&v=XdBd14rjcs0
Here's a cool little video on YouTube:
http://www.youtube.com/watch?gl=DE&v=XdBd14rjcs0
And here's more about Sun and cloud computing:
http://www.sun.com/solutions/cloudcomputing/index.jsp