Hi Mike,
I have written a bunch of these since ExtendScript was added to FrameMaker. I have also written ExtendScript scripts for InDesign. I have found that most of the requests I get are somewhat unique for each workflow, so these end up being custom scripts anyway. Adobe has written some free ones and put them on their Tech Comm blog, but their quality is not always the best. Please let me know if you have any questions or comments.
Rick