Postscript flowchart symbols for graphviz

I've been wanting a more complete set of flowchart symbols for graphviz for a long time. Since today is a holiday and the kids are out of town I had some time to finally hack up some postscript flowchart shapes that graphviz can use. Some shapes are already available but others have been missing. With the above shape file, you have to use the postscript driver to have access to a more complete set of flowchart shapes. But once you've generated postscript, you can convert the output to other image formats with something like ghostview. Here is an example - a student registration process as a flow chart. This example was proposed as a swimlane flowchart and originally from an article in CA magazine.

Graphviz flowchart example: A Student registration process