Last fall Global Map Solutions introduced (press release) its solution for created very smart PDF documents from ArcMap. Map users, armed with Adobe Acrobat (alas not Reader) and a free plugin could then manipulate them. (We covered the new technology at Directions Magazine.)
Yesterday the company announced (press release) that it now offers a free, non-Adobe reader solution. The PDF LOGIQ Viewer is built on the open source xpdf project commercialized by Glyph & Cog.