A few links

Here are a few resources that might come in handy:

• Informing the Design of Direct-Touch Tabletops
• Gestures, Shapes and Multitouch Interaction
  
• Multi-User Interface and Interactions on Direct-Touch Horizontal Surfaces:
  
• Collaborative Tabletop Research at MERL
  
• Experiences with and Observations of Direct-Touch Tabletops
  

As far as I know you can only reach them from the Nomad network at Chalmers.