According to a number of sources, Google is about to launch a new product called "Google Drive". The code above, which is embedded in Google Docs does seems to support that idea. In addition to the embedded code (above), Google Docs also includes an "Add to My Drive" button (below) that is currently in place just not visible to users. After discovering the first description of GDrive in 2009, I'm always a little skeptical of Google actually launching this service but this evidence seems pretty clear.
"Online file backup and storage... GDrive provides reliable storage for all of your files, including photos, music and documents... GDrive allows you to access your files from anywhere, anytime, and from any device - be it from your desktop, web browser or cellular phone".
The text above from http://pack.google.com/cistrings.js which was modified last week, seems to be more compelling proof that Google's GDrive is nearing launch ready status. Interesting to note the potential of GDrive access via cellular phone, music file storage and it perhaps being offered via Google Pack.
UPDATE: - It has been confirmed, this is the first "Official" description of GDrive.