I wrote a script a long time ago that will report if an object is a closed "solid", and if not, it will report the number of naked edges. However, it's kind of pointless now as the ShowEdge command will do this for you, as well as show you the naked edges, and even let you zoom closer to them.
It also outputs the results to the command line.
Does this work for you, or is there something else you need it to do?
Dan