iSuppli, a digital signage industry analyst firm is holding a Flat Information Displays Conference 2004 November 17-19, 2004 in San Francisco, California. They will cover the flat panel industry and opportunities in digital signage. Webpavement will not be at this conference, but will update you if anything notable comes out of this show.
iSuppli's newest publication (pdf) called On Display includes a section by iSuppli digital signage analyst Sanju Khatri with updated digital signage market numbers.
Digital-Signage Market Generates New Opportunities
Revenue expected to reach $2.4 billion in 2009, iSuppli predicts