DiskRing is a Mac OS X utility that displays the disk usage through a handy ring chart effect (like GNOME's Baobab for example).

You can download the program here: http://www.prototypeproject.org/diskring/download-1.1.php

and the source code here (the code is very sloppy... sorry): http://diskring.googlecode.com/files/DiskRing-1.1-src.zip

If you are interested in joining the project please contact me at ilfigliodellaparolaavuoto AT gmail.com

Luca Castagnini