I recently posted about using aliases in a convenient location to point to two different iTunes libraries. It works like a champ on my Mac OS X 10.5 (Leopard) system, but not with my laptop that has been updated to Mac OS X 10.6 (Snow Leopard). I tried creating traditional Mac aliases, as well as simple symbolic links -- both are grayed-out in the file dialog window. I'm not sure why yet, and a simple Google search didn't turn up anything helpful. Of course, navigating to the action library works as it always did. Weird.