Since most people leave them off, and most people link that way and it's easyer to set up I have site wide slash removals.

You get a 301 regardless if people link to you wrongly, so be carful when giving out the url and internal linking you use the right on either way.

I'm also not convinced that the article quoted is right in saying that the server does a 301 when you leave it off. It certainly has to do an extra lookup stage to find the right file(look for file, not find, look for directory with defualt document), but theres no 301 header returned.

There are meny crawl tools out there, but Xenu is the one I would recomend for this. It will crawl your site, and then at the end ask for your ftp details so it can specificaly check for ophaned pages. That should make the report you need.

*edit - here's the link: http://home.snafu.de/tilman/xenulink.html