Tagged PDFs allow for the easy reflow and accessibility of PDFs. It seems like this would be a natural use case for using LaTeX, which advocates content over style. But as far as I can tell, there is no way to create a tagged PDF with MikTeX 2.8.
Does anybody know of any tips, tricks or techniques to get a tagged PDF through LaTeX without resorting to the commercial version of Adobe Acrobat?
Hmm, well, yes, sort of.
There isn't really sophisticated support for tagging, and what there is, is implemented in pdftex/luatex. Support for bookmarks and in-document cross-references is done using tagging. There's also been some more sophisticated work shown at TUG conferences, but this is all in the pipeline for now.
Context/luatex has better support that Latex for this sort of thing: there's some support for interactive documents using Context's layers, where the contents of the layers change when buttons are clicked in the PDF. I think this must be done using tagging.
I've never heard of anything like embedded forms, digital signing, or embedding the Latex/Tex/Context source in the resulting PDF, but in principle this is all possible.