"I’m hoping to create a SOAP and XML-RPC interface that would allow you to submit your OPML files for transformation to VDX/GIF files, then I’ll send them back to you. I’m also hoping to go the other way, you give me a VDX file and I’ll give you back an OPML file. Fun stuff!"
Nice idea: a web service to turn an XML outline into a Visio or gif chart, or in other words, a way to do roundtrips between structure and presentation.