Note that since the directory items start off collapsed, people who are not running Javascript will not be able to view the contents of the blurb, as they will not be able to use the expand buttons. If you anticipate this being an issue, you may want to make sure all of your entries have a "contents" page.
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As to this: "Also, you can always go dumpster-diving in the templates and php files for anything I left out. Don't be afraid, there's not much you can hurt."
This applies to anything short of the attribution notice. Feel free to rename the php file itself as well to make it more descriptive -- but if you do this, make sure you go into the file itself and change any instances of the old filename. I can probably use some self-referential variable instead, but I got lazy.
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I like seeing how people are using this, so please post a link to sites where you are running this! Aside from shameless self-promotion

we can get other ideas.