Recently, I had someone make a request for adding an X to a column in a sheet index schedule for all the revisions that sheet had. Currently, they have to do it by hand and it is tedious.
To get this to work, I added a parameter for each revision called "Seq #" (with # being the revision sequence number). I looped through each revision on each sheet and looked up it's sequence number, then add an X to the parameter matching it.
Here is a video showing how it fills in the sheet index schedule:
There's more information available on the Revit Coaster blog.