[51Cards]

Daisy Disk isn't a new idea... the Windows Freeware 'Scanner' by Steffen Gerlach was the first I saw to implement this disk view 8-9 years ago. Still find that utility priceless to this day.

http://www.steffengerlach.de/freeware/

[vasi]

Filelight has also been doing this in KDE since about 2003. I still think it's slightly easier to use than DaisyDisk, since the labels actually point to the sunburst chart. But DaisyDisk does look much spiffier.

[Stuk]

Ahh yes, this tiny application is a permanent part of my Windows tool kit. Absolutely fantastic for finding out where all the disk space has gone.

[babeKnuth]

try the new 2.0 beta. the "main viz" is essentially the same, but lots of little animation tweaks here and there.