Video walls come in a variety of forms that include rear projection, front projection, CRT, LCD, Plasma and others. We have categorized our links in order to make it easier for those who know what product type they need.
Datapath - manufacturer of turnkey video wall products below is an example of a trading application developed by data path

Video Walls for corporate meeting and tradeshows
XL Video - Our state-of-the-art video wall controllers bring your cube array to life with exciting special effects and complete software control to unleash your creativity. XL Video stocks controllers from Electrosonic and Synelec, two of the best rated makers in the industry.
Link to 9X Media. Sponser of the Multiple Monitors.org site

Link to 9X Media site Link to Multimon

9X Media - Specializing in designing and manufacturing custom video wall solutions for the corporate, tradeshow, education, and military markets.

Commercial LCD video wall solution providers

Pioneer Electonics - video cube products, read projection large plasma screens displays, video cube frame, cube systems.

Video wall screen and projector equipment manufacturers
Datapath Video wall

Exptech
Let Express Technologies Corporation work with you to implement the best overall product and software into your video environment. Choose from our large selection of CRT, DLP, Rear-Projection, Front-Projection and HDTV Systems.

AVFX - For AVFX, a video wall is not just a square stack of monitors or cubes. A video wall is a creative palette that is limited only by your imagination. We've always specialized in the unusual video walls. Why? We've found that unusual formats can add to the impact of the video. Look below for examples of odd shapes and mixed formats. We've even combined monitors and cubes. Also look at how we are using Plasma screens as an addition to our video wall expertise.