I have used the VI Toolkit (free) from VMWare with PowerGUI (also free) with the VMWare 'add-on pack' to find out more this information. Below are a few links.
http://www.vmware.com/sdk/vitk_win/index.html - link to the toolkit and has a link to MS Powershell (needed for the toolkit)
http://powergui.org/downloads.jspa - link to downloads for PowerGui
http://powergui.org/entry.jspa?externalID=1802&categoryID=290 - link to download the VMWare PowerPack
This will give you much more insight into the environment and capability to do other common tasks across multiple VMs all at once. Common examples would be disconnecting the CD and Floppy from every VM with one-line of code from the forums or using other scripts from the community (http://www.peetersonline.nl - another excellent site) for other helpful tasks.
As for the snapshot functionality, the VMWare Powerpack will break it down to all, older than 7 days, older than 1 month, in easy to see views.