Just unregistered a sidebar for the template themes running http://sryan.us and accidentally forgot to move the widgets to another widget space before it went into the nether. Luckily, the software realized that I probably still wanted those things someplace, so it went into an “inactive widget” holding queue. So, after I set up the new widget spaces, the old widgets that went in them were ready and waiting to be dragged into a new home! Thanks WP Development team – just saved me about 45 minutes worth of work!