Mark this on your calendar. This coming Saturday, at 7:30 a.m. California time, Gustavo Dudamel (soon to open the 2010-11 season of the Los Angeles Philharmonic) will conduct a concert with the Vienna Philharmonic at the Lucerne Festival in Switzerland. As the LA Times reports, the concert will be webcast live for free at www.medici.tv. It will also be available for 90 days on demand. Pieces will include Rossini's overture to "La gazza ladra," Orbón's "Tres versiones sinfónicas," Bernstein's "Divertimento for Orchestra" and Ravel's "Pavane pour une infante défunte" and "Boléro."