I do plenty of JSFL work.
Often I come across blogs that mention 'undocumented' JSFL commands that turn out to be tremedously useful, such as:
therey are certainly not mentioned in the adobe PDF.
Is there some actual source for these, or a special method of uncovering them?
If you work a lot with JSFL you should have a look into xJSFL
I used it a while ago for a project, and got the impression that its rather well documented.
Flash CS5+ uses the SpiderMonkey engine from Mozilla for his JS.
You should look on the projects homepage to get all the undocumented JSFL commands you can wish for...