How it works: Start the Blender Game Engine by pressing the P-key during the mouse cursor is over the 3d-view-window!!! Now walk into a wire mesh object and the defined internet-address will open.
Editing the urls: Open the script (Web.py) into the Blender text editor, there you can change the urls you want to use. https://www.youtube.com/watch?v=zFWakHGAEjo