I just made this:
I originally intended to do it in OpenOffice and script that a little, but it turned out that one (major sucker anyway) had a limit of 256 columns (at least on CSV imports). So I booted Win2k and run Lotus 1-2-3, but it has a similar limit (ok it's from the last millennium).
I then reshaped the script output to make data in columns, but this is the result from Lotus. Still looks pretty cool, eh? Maybe direct SVG output would be better though.
Now it's made it to the developer blog ☺