The Mural Conservancy of Los Angeles has a lot to do these days, what with the explosion of public art, both official and "uncommissioned," and the global attention finally being paid to our city's rich history of large-scale outdoor works of art. Among the trove of such gems getting some TLC from MCLA have been the so-called Olympic Freeway Murals — a suite of works by 10 artists commissioned by the city as part of the arts festival that attended the 1984 Summer Olympics. You've seen them along the 101: great faces peering at you suddenly in an underpass, a flock of huge playful children, bright yellow cars. This afternoon's benefit reception, print release and silent auction, "The Olympic Freeway Murals: Celebrating 30 Years," will fund the completion of this Herculean task — but it is also a rare chance to honor those original 10 muralists in person, and meet the legends of then and the faces of now that make L.A. a global destination for all lovers of a good wall. Pico House, 424 N. Main St., dwntwn.; Sun., Aug. 24, 1-4 p.m.; $25-$200. (213) 291-6900, muralconservancy.org.