I thought this was interesting enough that I had a play.  Sebastian is right - I knew he would be.

It turns out to be pretty easy to get the module substitutions in the HTML module to recognise a new token and return it to the UI.  I probably wrote about 10 lines of code.   It took longer to work out where to put them than to do them, but if anyone wants them I'll have them about "for a while".

Exactly as Sebastian says, getting what the OP actually wants out of it is *much* harder.

You can get to the version edits of the HTML module. Every change in the TEXT/HTML module is stored in a version. You can build a report out of this with reports module e.g. ordered by change date. Then you have a pretty decent change list.

I seem to have lost the SQL, but here is the report:

< li>< a href="mydomain/tabid/[TabID]/[TabName]/default.aspx">< b>[TabName]< / b>< / a> on: < i>[LastModifiedOnDate]< /i>< br/ >in: [ModuleTitle], by: [DisplayName] < /li >

I added some spaces just to make sure the editor does not screw up the html.

Peter