Converting Documents to PDF on upload

Want an extension that can upload a word document and it gets converted to PDF document.
Could be combined with pure asp upload or integrated to work with a popular server component.

Anyone know whats the best / cheapest server components available?

OK you got Image Processor and Pure ASP upload what about clients who like to upload thing besides images. ie word documents. Most Business created word documents but seem relucted to work with PDF.

Obviously PDF is the ideal document format for the web. It would be great if us designer/developers could create a backend systems that not just uploaded and resized images for our clients but also uploaded and converted word/text documents to PDF.

For example an estate agency might want to supply additional property details. They probably already have word documents created for display purposes.

They don't want to type info in again into a backend sysytem (only minimium details) and don't want to purchase batch conversion /  print to pdf utilities for all their machines /branches.

In the back end system they just want to browse to word documents and they get converted into the right format ie PDF.

Really I guest I looking for either software to monitor a folder on the server and auto convert or have it built into a Dreamweaver extension.

Anyone know whats the best / cheapest server components available?