I'm about to try the same thing, curious if there's an update.  Were you trying to dynamically load .pde's, or writing the .pde directly into the HTML?

In my case, users are posting their work to my site app. Originally I was creating files from text input into a form and putting them on Amazon S3, then pulling it back out when I needed it. As it turns out, this was overkill. Instead, I just take the code pasted into the form and store it as a single string into the database object for that project.