linking revisions of a series

[Andy Doan]

I was wondering if anyone had interest in adding support to allow 
patchwork to somehow track revisions of a series? Basically, I'm needing 
to track as series from start to finish and a Series object in patchwork 
currently has no links to related series. I have the following rough 
idea in mind and wanted to get some feedback before getting too deep 
into this.

  if new series created
      get list of all series with matching project and submitter
      if the subject of one is similar to the new series:
           add some marking (foreign key?) to the new series.

We'd then have a link-list from start to finish. Is this crazy? Has 
anyone tried something like this already?