A good friend and ex-colleague of mine seems to have been bitten by an evil bug causing him to devote his free time to creating a tool that will report all hidden shares on a remote machine.
The tool is available for download here.
Your colleagues in your lan thought they could hide their party photos and mp3s from you, but not any more.
Link: http://projectdistributor.net/Releases/Release.aspx?releaseId=413