I’m new to this forum and this is the first discussion I’ve seen…
My company, WatchDox, actually provides a solution that secures corporate documents on any mobile device (or PC). It allows the enterprise to restrict users from copying, printing, forwarding or otherwise removing documents from their device, tracks the documents at all times, and allows their remote destruction.
The interesting differentiation here is that the approach is document-centric. This means that the company doesn’t have to manage the device, and in fact the device may even belong to a third party whose devices will never be managed by your enterprise. Still, you will be able to control, track and destroy documents you have shared and are stored on the third party devices, since each document is “individually wrapped”.
Geo-fencing, connectivity and synchronization with SharePoint, and other capabilities mentioned on this thread are also options this product can offer.
If this is what you were looking for, please contact me or check out http://www.watchdox.com.