Nice how-to over on Hack a Day making your own networked graffiti wall… Ian writes-
Wondering what we did with our web server on a business card project from last week? Itâ€™s powering a giant LED graffiti wall. Animations can be user-submitted using the online designer. You can watch a live feed of user animations as well. The online interface runs on the Google App Engine for maximum scalability and resilience. In todayâ€™s How-to we cover all the ins and outs of building your own networked graffiti wall.