Armed with homemade mini--broadcasters and little else, the underground DJs of Pirate Radio USA are on a mission to scuttle corporate domination of the airwaves. The 2006 documentary offers a look at illegal stations where radio pirates microcast their programming at ultralow frequencies, FCC regulations be damned. Filmmakers Jeff Pearson and Mary Jones narrate effusively from a working pirate radio station, revealing a world where the little broadcasters have the means to exercise true freedom of speech (and do so -commercial-free, of course). The film showcases setups from the Tucson desert to the ports of Washington State, with broadcast excerpts providing a taste of autonomous radio in action. The budget is small; you have to love the purposefully modest plastic models used to portray the films different locales. The message, however, is clear: Sometimes winning one for democracy means operating outside the law. Funds raised today benefit the Houston Independent Media Center. 7 p.m. Rice University, 6100 Main. For information, visit www.himc.org. Free; donations encouraged.