Martin Wattenberg is one busy Net artist. Not only has he recently launched "The Shape of Song," a site that allows visitors to visualize any musical composition available online, but he's also just started working on a new interface for the future Web site for NASA's artist in residence program. Now he's the first Net artist to be chosen to work with NASA; for 30 years, the government agency has asked cutting edge contemporary artists such as Nam June Paik and the Starn Twins to create original artwork related to space exploration. Wattenberg's new art interface is scheduled to debut in November.