To make better use of my 50 GB of free online storage at Box.com, I've just learned that you can map it a network drive.
Right-click on "My Computer" (or "Computer") and choose "Map Network Drive...".
In the "Folder" box type http://www.box.net/dav/
Click on "Connect using a different user name." and input your Box.com username and password.
Click the "Finish" button and in a minute or two you should have a new network drive on your computer that is your Box.com files and folders.