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>OK, so this isn't the most elegant code (it'd be nice to disable the "Back" button when at the top of the History stack), but it works. Interestingly, all of the links only go one level, so it turns out, a "Back" button isn't as useful as I though (until deeper links are added to the form).
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I guess I missed the other pages listed - XML Web Services, etc. It looks like what is required to do the "Back" button correctly is to build a true history stack (FILO), and move through that instead of attempting to use the browser's built-in history (so you can do things like skip the "Loading Pane" pages. Oh well, when I get some more time I'll have to add this.