Not sure about a report, but details of what was scanned when appear to be recorded in a log file under the "Foundstone" application directory:
[Path to Foundstone app]\Logs\LogFile.yyyy-mm-dd.txt
I'm using an appliance, so I'm not sure what path your Foundstone application will be installed.
This information isn't kept anywhere (reports or DB) but examining the daily logs (as dangerousd said) might get you what you need.
If you're looking for something more, you might want to consider opening a Product Enhancment Request (PER):
From McAfee.com: https://secure.nai.com/apps/downloads/products/product.asp and selecting McAfee Vulnerability Manager (Foundstone) will take you there..
Or: https://community.mcafee.com/groups/mvm-news click on the Submit Feature Request button
I hope that helps!