There are some posts around about various task board solutions. Besides that we use white board to sketch some designs and exchange knowledge, we use virtual board as task board and info radiator.
Simply we have a jQuery script that runs in a web browser that rotates some most important pages with our project status. These are JIRA/Greenhopper task board, Jenkins, Sonar and current app snapshot built and deployed automatically by Jenkins.
And where this board stands? In front of us, at the windowsill where every team member sees it.
What is it? An old computer with 20" display.
Our colleagues from other project had ordered about 30" monitor but they have our company owner in team so this was obvious that they should have bigger and better display ;-)