Margaret Leng Tan has established herself as a major force within the American avant-garde -- a highly visible, talented, and visionary pianist whose work sidesteps perceived artificial boundaries within the usual concert experience and creates a new level of communication with listeners. Embracing aspects of theater, choreography, performance, and even "props" such as the teapot she "plays" in Alvin Lucier's Nothing Is Real, Tan has brought to the avant-garde a measure of good old-fashioned showmanship that is tempered with a disciplinary rigor inherited from her mentor, comp...