If you hover over the folder names, you will get an un-intrusive popup with info on that folder.
If you click on the folder name, it will zoom-in on that folder.
Also, while hovering over a folder, you can perform the following functions:
- Open Containing Folder
- Open Folder
- Delete Folder
Visit the author's web site for downloads and more screenshots.
As Mike pointed out, there is another app that is similar to this and which is open-source and has a little more eye-candy.
ps: Comments and/or links to this article are most welcome!