God knows what you are talking about, but the person you quoted was talking about people who are disabled finding it hard to navigate flash sites.
God does know, but that's not me...

He did provide an answer, but as you noted, most won't know what these things are.
SWFAddress is a JavaScript which can tie any link with in the SWF into the address bar. This makes the refresh, back, and next buttons behave as one would expect, as long as the developer knows how to make it work.
SWFobject can be just as important for accessibility as it is for making a Flash site searchable by web bots. I'm not sure how best to explain this, so here I go:
First off, it's function is to embed the SWF onto the page, if the requested version of Flash is present, it writes the object into a targeted DIV. This all happens instantly.
OK, in that mentioned DIV, one can put important links and copy for that page.
Now why this is important, is that if someone doesn't have FLash, that content will show up and the user can navigate a basic version of the site, but more importantly, that information is all searchable by a web bots, or readable by any tech that can see HTML, so any descriptions and so on.
Now that HTML content that's is hidden by Flash, can then be pulled into the SWF and rendered in absolutely any way imaginable with any font. Compared to just HTML and CSS, Flash has absolutely no limits --
but of course this can lead to bloat when a developer is inexperienced.
I'm probably not being clear enough, but It's good practice of any Flash site, to make sure all their content is accessible like any other HTML site. SWFObject just allows one to put all their content in HTML, where anything can find it, but that content will be hidden in its basic form to anyone that has Flash installed.
Anyways, Adobe has had several articles on accessibility over the years. It's completely possible to go way beyond CSS/HTML with FLash, but this all falls on the developer.
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Just a general comment, I think it's ironic that most see Flash a bandwidth hog, when it can do more with less than any other tech, but of course that all falls on the developer's experience
-- too many are lacking in this area and they work for larger agencies.