GraphViz Site Map script now offered under GPL

Sorry to keep posting announcements about the GraphViz script here. A few people have been asking for the PHP script that runs the GraphViz Site Map Generator so with some reluctance I am now offering the script for free use under GPL. I'm mainly reluctant to share it so openly because it shows my limited understanding of PHP :(. But if you want to hack away at it to make it better, please send me back the improvements you've made. You can grab the script (it's one file), but I'm not going to be offering any major support. Let me know if you use it successfully somewhere.