Windows Live Sync is a relatively simple, yet effective technology that keeps selected files and folders synchronized on multiple computers. There are two primary applications for this that many of our clients rely on heavily:

1. Individuals with more than one computer (say, a Desktop and a Laptop) can effortlessly keep their "My Documents" folder, their Internet Explorer or other browser Favorites, desktop icons, and more fully synchronized, such that a change made to one of the computers is immediately reflected on all other computers in their synchronization group. So, a Web site added to your Favorites group on your laptop while on the road will show up automatically in your Favorites on your desktop the next time you use it!
2. Work groups and other teams can easily select a certain folder on their computers that will remain in sync. So, they could create a folder called "c:\projects" and when any group member adds or alters a file in that directory, that change will immediately be reflected on all other member computers. This allows groups that are not co-located to coordinate on files easily and securely without having to use the typical "email out the latest version" technique!