Martin Wattenberg’s work centers on the theme of making the invisible visible. Projects include The Shape of Song, Third Person, the Whitney Artport’s Idea Line, and Apartment. Wattenberg is a researcher at IBM, where he creates new forms of data visualization. He is also known for the SmartMoney.com Map of the Market. He holds a Ph.D. in mathematics from U.C. Berkeley. Marek Walczak is an artist and architect who is interested in how people participate in physical and virtual spaces. This has led to projects such as Apartment, shown at the Whitney Museum and many venues worldwide, and Dialog Table, a commission of the Walker Art Center that replaces a keyboard and mouse with a shared interface based on gesture recognition technology. Current projects include a one block long facade at 7 World Trade Center that reacts to pedestrians walking beneath it (for James Carpenter Design) and interactive video installations such as Third Person, recently shown at the ICA, London. Marek trained as an architect at the Architectural Assoc. in London and Cooper Union in New York.