Online document hosting service Docstoc is out with a product update this evening. The update allows anyone who uploads private documents on Docstoc the ability to closely track and monitor usage of the documents. While Docstoc is known for public document sharing, this new set of monitoring tools allows a content creator to more closely track who is viewing the documents, email infomation, and the ability to lock documents for viewing online. This seems much better than emailing around a PDF and potentially having it leave the circle. Users who aren't registered on Docstoc get prompted to enter their... [Tags: ceo, confidential information, content creator, emailing, free online budgeting software]