There is a use for such a program. When you delete a file off your hard drive, only the reference to the file is deleted. The data itself continues to reside on the disk until it's overwritten by new files.
Having a program write random garbage to unoccupied spaces on a hard drive ensures any left-over data residing in those spaces are effectively destroyed. It's the most effective way to ensure that no compromising data falls into the wrong hands.
The concept Web site mentioned in the article could eventually become a useful tool requiring no software installation on any computer.
I'll let you people figure out the legality of such a tool.--
Watch my future television channel's public test broadcast!