Running Flash On A Web Server

I work on a lot of digital media projects; which often require dynamic graphics. I find flash to be a great tool for this purpose. It's very easily to dynamically change text inside a swf, compensate for text overflow and apply lots of nice filters and effects. Not to mention font embedding. This technique works great for web pages, however quite often we want to use flash generated artwork in a html email. How can we do this? Well, we can use as3corelib to generate a jpg from a swf, and then use the generated image in an email.This is fine, so long as we can pre-generate all of the images, before sending out the emails. But say we need to generate the dynamic jpeg on the fly from a webpage? If the user on the webpage has flash installed we could configure a swf to generate the image for us.But what if the user has flash disabled? Maybe they are using an ios device or simply don't like flash. What I would like to do is set up a server side fallback that could run a swf, replace text in the swf based on supplied variables, generate a jpg using as3corelib and save the jpeg somewhere. The trick here is running flash player on the server. It would also need to run in a multithreaded way in case the server needed to process multiple requests.