What do you get when you mash-up Microsoft Surface with a Wii Balance Board? Pressure-sensitive surface computing! Yes, the Surface is sitting directly on the Balance Board (it supports 600 pounds, we checked). Here, Josh demonstrates a simple application that lets users create bubbles of various sizes and roll them around the table using pressure on the edges of the Surface. You also get a sneak peek at the WPF/Silverlight physics engine we've been working on as well. Pressure sensitivity adds an extra dimension to the Surface experience and opens new doors on an already highly advanced platform.