Here's the multi-touch blog from Renci. There are two form factors that Renci is working with, a large multi-touch wall at Duke, and a horizontal touch-table at Europa.
My hope is that a touch-table will grace the Social Computer Room. A long-term vision would be to extend our Collage/InfoMesa ideas in the SCR, using the 360-degree display to provide visual real estate. Imagine a group working around a touch table, shooting images out to the 360-degree wall with gestures on the touch table.