Following are several research and data resources documenting the multiple monitors market as well as related multi-screen display, LCD screen and multi-display technology trends.
USDC
GDN
The leading market and technology research firm offering a full line of comprehensive analyses on all display markets including: Flat Panel Displays, CRTs, CRT and LCD Monitors, Projection Systems and Manufacturing Costs.

Toshiba and Matsushita to Unify LCD Business; A New Joint Venture Slated for April 2002

Link to 9X Media. Sponser of the Multiple Monitors.org site

Aberdeen Group provides IT market intelligence, positioning, and market acceleration services to established and start-up technology companies.
Link to 9X Media site Link to Multimon

The United States Display Consortium (USDC) is an industry led, public/private partnership providing a forum for flat panel manufacturers, developers, users and equipment materials suppliers.
IDC
IDC is a leading provider of technology intelligence, industry analysis, market data, and strategic and tactical guidance to builders, providers and users of information technology.
The Global Display Network (GDN) is an organization dedicated to encouraging the growth of the global flat panel display (FPD) industry. GDN is sponsoring this web site as a central resource for companies engaging in all aspects of the FPD industry.
With more than 700 analysts worldwide, Gartner is a source of business and technology intelligence and consultation.