Back Pocket was designed to allow Windows Mobile Pocket PC users the ability to take their desktop files with them on their Pocket PC. Sounds basic and yes, you can already do this with Active Sync but Back Pocket does things differently. Using the Back Pocket "Snap Shot Viewer" which is actually a Desktop application, you will take a "Snap Shot" of a single designated desktop folder which creates a compressed set of files. Taking a "Snap Shot" both copies these desktop PC files and compresses them to be placed in a "Temp" folder on the desktop PC.
Each "Snap Shot" is autonomous in both logical and physical aspects to any other "Snap Shot". Each "Snap Shot" has a unique ID and a place for adding text information about it which is stored along side the files contained in it. As your work (or files) changes, you can periodically take "Snap Shots" which record historical copies of the original files which are compressed. You can then backup the entire set (all "Snap Shots" with metadata) to your Pocket PC. After that you could restore to a different desktop PC via your Pocket PC and would then have access to not only a single set of files but all historical copies as well (and notes about them too).
Personal Source Control
A developer or graphic designer that works in two (or more) locations needs to take files from one to the other and also needs to recall files changed since last week or the week before. As a web developer, since you can restore a whole directory "root", you could actually deploy the "Snap Shot" as a web servers root folder by version or "Snap Shot ID". As a graphic designer, you could keep track of mock-up versions and assets as they are changed. Since you have the ability to take notes for each one, it makes it easy to see each of the "Snap Shot"'s attributes.
Pocket PC as a Backup Device
Store you important documents or (binary or text) as "Snap Shots" then back them up to your Pocket PC. Since the files are not converted for use with Pocket PC programs (converted by Active Sync). They are not accessible to be viewed easily on the mobile device (although not encrypted). "Snap Shot" sets are also stored compressed which gives the ability to store more.