Cloud computing is all the buzz nowadays. If you have not heard, servers (and now desktops) are available from a hosting company that are pre-loaded with applications. Instead of purchasing a server, you rent time on one, kind of like web hosting, but for your whole network.
The new version of Ubuntu Linux 10.04 desktop has cloud computing capabilities. Read all about it in Ubuntu Desktop in the Cloud. One benefit of a cloud desktop is to not have to burn an .iso every time you want to test some software. It would also give you the ability to have a personal desktop available from a browser anywhere in the world. Kinda cool.
Sure cloud computing does offer the capability to save corporations money. I just am not sold on security for cloud computing. In my humble opinion, to open up your network to a server (or desktop) from some other third party location is just inviting trouble.