How does your IT department ensure data security on client PCs?

We have only 100 clients, so we are a pretty small operation which makes things a little easier.

We have a fileserver loaded with a couple hundred gig of storage, everyone has a mapped home directory to this fileserver. Each person's home directory has rights only for the user and for admins, so no other users can access it.

Employee's are coached, reminded and encouraged constantly that ALL documents are to be saved in their home directory (spreadsheets, word docs, pictures, etc.).

The fileserver is backed up nightly (using Backup Exec 9.1) incrementally 6 nights out of the week and 1 night it gets a full backup.

By doing this practice, very little is ever stored locally on the client's machine outside of the OS files (of course) and the applications.

We also have ghost images of our standard client build (which we re-do to included the latest patches once we feel there are significant amount of patches to make the time worthwhile to create the newer image).