The video decoder boards do all the hard work - All you need is a DVI/HDMI/Displayport output with the proper cable, a good 5V power supply and a little wiring time. The driver supports up to 1024x800 displays but we found even 96x96 was pretty cool! Once programmed and configured you can use any video source, we've gotten the wall to display from a Mac or PC (or BeagleBone!) without any problems. Now you can make your own LED video displays for fun!
Please note! This is not a a beginner project! There's a lot of wiring and power management. We don't sell all the components required so you may need to spend some time getting all the parts you need. Building the wall can take a few weekends and requires care and patience. Here at Adafruit we love this kind of thing, and we have documented the process as best as possible but there's not a lot of documention out there about these systems so even though we got our wall working nicely we do not offer any kind of consulting or assistance beyond our forum tech support. This is not a project for a mission-critical, outdoor, mobile or other LED display or for use beyond hobbyist hacking!