I've started a new branch in Antville CVS dedicated to the skinset ideas I posted a few days ago. So far, there's only a db update script, a new skinset prototype and the modified type mappings for skinmgr and skin. There's currently no skinset/skin editing code yet, but after doing the update your site should look just like it did before, thanks to this little hack.

Todo: Add skinset references to site and story, add skinset selector boxes to site preferences and story editor, move skin editing code from skinmgr to skinset, add "edit skinset" list and "create new skinset" link to skinmgr. That should be it.