This one is a project made in the school I went to... go K3! 
"The TableTalk project is our final product from the course physical computing 2 at K3. The idea is to take something invisible and make it visible. We have chosen to work with speech, one of our key elements in our social interaction. We see our prototype as a cultural piece and not as a problem solving gadget. We want our technology to be secondary, or on the periphery to the bigger picture, giving the participants a visually exiting table. But if you sit at the table for a longer time you will hopefully understand how the table works."
