A few hours later I had a proof of concept script that even worked fairly well, thanks to a great little JavaScript/Canvas graphing kit called PlotKit from liquidx.net (which uses excanvas by Google, and MochiKit). 

Some screen grabbage:

Adds a button to the nav bar

Overlay Graph

The graph is currently edits/time, and it tries to pick an appropriate time scale (months/weeks/days/hours/etc) depending on what the data points are. In the future I’m probably going to add functionality that will let you choose between different datasets, including edits/user.

You can install this script for your use if you use Firefox and have greasemonkey installed. It’s currently setup to only work at en.wikipedia.org, but you can add @includes and it should work with any standard wiki setup.

Update 1: I completely revamped the entire code base, added a new graph option, and made some buttons that let you fiddle around with how much/how the data is displayed.

Update 2: Finally able to get all the external libraries into a packed form and in the proper order so this isn’t such a bear of a file anymore.

Update 3: (version 1.21) Fixed a problem with the aggregation method that caused all times to show at least 1 edit.