Web visitor blinker

The first functional version of a physical, natural ambient display indicating visits to this website. A visit to the website blinks a green LED on the Arduino board. A clever PHP script checks how many users are online, so not every page-view is indicated, but only new visitors. Java/Processing checks the IP's of visitors and compares them every X seconds. Thanks to Ralph, Björn, Brock and Stephan for help in scripting.