It would be nice to have a hook to include files after headerinc cause now if I wanted to add a css or js file I would have to require the user to change his template file and that's not how plugins should work (or am I wrong ;) ), so it would be nice to have a hook in there.
Sorry, it's in the admincp/global.php file, but you know that ;)
Actually I did add it to the list but forgot to commit the file, should be updated.
Thanks for adding the hook, but you forgot to add it to the hooks list in admincp/plugins.php so I'm not able to add it to my plugin ;)