An open office is a blessing and a curse - we're not talking about the program either. Quite often its easy for them to interrupt your workflow when you're in the middle of important projects, so GreyNut have developed this little product they call the Luxafor - a small light-up flag that will alert others of your 'busy status'.
Something like a real-life Skype setting, this flag uses a simple red and green lighting option connected via USB to a simple app installed on your PC. The little flag will also raise when certain applications have been opened, if you st it to do so. They've even included things like email notification and the ability to make you a morning coffee - without the last part.
If they reach $42,000 in crowdfunding, this device may become a reality. If you're keen to donate to the project, feel free to head over to their Kickstarter page and made your pledge.
If this does become a reality, you're probably going to set it to red all the time anyway - otherwise what will your boss think?