title: How to sort images into folders, based on resolution?
body: <p>Background: I've got a folder full of saved desktop pictures.  I'd like to put them into folders, based on their resolution - 1024x768, etc.  Creating the folders on the fly is a bonus.  Currently, the images are all in a folder, but some of them are in sub-folders.  I can merge them by hand, if that makes things easier.</p>
  
  <p>I'm using Mac OS X, but I'm not opposed to installing extra apps to accomplish this (MacPorts?), or even using another OS (I've got Windows XP, Windows Vista, and Ubuntu 9 setup right now within VMWare).</p>
  
  <p>Any help would be appreciated!  Thank you!</p>