Ophira,
There may be some options you can currently look into. For example, you can see if the Stay Tuned App from our Marketplace will give you the information you are looking for. Here is the URL...
http://www.clarizen.com/appsmarketplace/item/stay-tuned.html
Also, you can work with your Customer Success Manager to build a customization that could track this information as Notes, discussion posts or other.
Last, we can submit this as a Change Request to have something built and available out of the box.