Dear Mark,
Karsten asked me to inform you about our PDFreaders campaign http://www.fsfe.org/campaigns/pdfreaders/pdfreaders.en.html. I am happy to hear from you again.
IIRC when we started http://www.pdfreaders.org in 2009, you contacted us and had a phone conference with Georg Greve (at that time FSFE's president) and Hannes Hauswedell (both in CC). So I assume you know the background of that website. But if you have open questions do not hesitate to ask.
We started our current campaign because many people complained that certain government websites (only) advertise a few non-free PDF readers -- although PDF in most of it's versions is an Open Standard http://www.pdfreaders.org/os.en.html and most files display very well in Free Software PDF readers.
So we wanted to highlight the fact that unlike with some proprietary formats, there is Free Software which you can use to open the PDFs on the websites. We think that this also strengthens PDF's perception as an Open Standard, which is very much in your interest, if I recall your arguments from 2009 correctly. On the other hand, having web-sites state that a single or a very limited number of proprietary applications (be it Acrobat Reader or Foxit) is *required* to view these file, weakens PDF's perception as an Open Standard.
That's why we asked volunteers to look for such statements so we can contact the public institutions and explain them Free Software and Open Standards.
Beside that we are still in contact with developers of Free Software PDF readers and try to help improving this software.
Best regards, Matthias Kirschner