– Art Miami to Show Purloined Banksys: The British street artist will be the subject of a Mr. Brainwash-caliber spectacle during this December's art fairs in Miami. Four six-and-a-half-ton concrete walls will be shown as part of CONTEXT, a new addition to Art Miami. Works from the outdoor exhibition, cheekily titled "Banksy Out of CONTEXT," are from a private collection not for sale, and are meant to provoke ethical debate about showing street art out of context. [Miami New Times]

– "Lost" Inspires L.A. Art Show: This winter Marc-Olivier Wahler, the former director of Paris's Palais de Tokyo, will curate an exhibition at the Los Angeles Municipal Art Gallery inspired by the much-loved but long-ended sci-fi TV show "Lost." The show, "Lost (in LA)," will from run December 1 to January 27 and includes works by Oscar Tuazon and Thomas Hirschhorn, among others. Organized by the non-profit France Los Angeles Exchange along with the Palais de Tokyo and the City of Los Angeles, it promises to be loosely connected as the show from which it draws inspiration. [TAN]

– Astor Estate Sale Soars: On day one of Sotheby's sale of the estate of late philanthropist Brooke Astor — proceeds from which will benefit the Metropolitan Museum, New York Public Library, and her favorite charities — objects from her Upper East Side home and mansion in Westchester vastly outperformed their estimates. A John Frederick Lewis painting more than tripled its $500,000 high estimate to sell for $1.6-million, while a Canaletto drawing with the same high estimate surged to $1.2-million. Today's lots include Astor's dog paintings and jewelry. [Bloomberg]

– China Guardian Gears Up for HK Debut: Three major auction houses will go head-to-head this month in Hong Kong as Sotheby's, Christie's, and China Guardian hold their fall sales. Guardian is unlikely to surpass Sotheby's in its debut Hong Kong auction as it will be restricted to 340 lots of Chinese art (compared with Sotheby's 3,300). Still, it has some competitive items: Guardian's top lot, an album of 1920s landscapes by Qi Baishi, is estimated at $2 million to $3.5 million. [Telegraph]

– Olga Viso Appointed to National Council on the Arts: President Obama has nominated Walker Art Center director Olga Viso to the National Council on the Arts, an advisory body for the National Endowment for the Arts. Viso has some history in Washington: before moving to Minneapolis, she served as the director of the Hirshhorn Museum in D.C. (Of course, if Mitt Romney gets elected President, the NEA won't exist long enough for Viso to advise it.) [CultureGrrl]

– Tilda Swinton Tries on Costume Conservation: This week, the muse and actress is in Paris starring in the one-woman show "The Impossible Wardrobe," a new performance staged at the Palais de Tokyo and conceived by Musée Galliera director Olivier Saillard. She plays a costume conservationist at the latter museum, France's foremost fashion institution. For the mysterious site-specific play, staged as part of Paris's Fall Festival, Swinton studied the movements and gestures of the Galliera's staff and curators. [Libération]

– Guerrilla Artists Enliven Mogadishu: When radical Islamist group Al-Shabib left Mogadishu a year ago, Somalian artists took advantage of their newfound freedom, banding together to paint by day and plant canvases around the city by night. The paintings, which pop up every new days, take potshots at Somalia's clan warlords and present hopeful images of a city newly free. "Of course, something could easily happen to us," said artist Mohamed Ali Tohow. "But it's better than it was." [LAT]

– Gwangju Biennial Gets Political: The recently-opened 2012 Gwangju Biennale maintains the South Korean exhibition's tradition of highlighting socially conscious and politically engaged art, with this year's offerings — curated by a team of six women from the Middle East and Asia — drawing frequently on the imagery and ideas of the Arab Spring uprisings and the Occupy Wall Street movement. Michael Joo's sculptural installation, for instance, is suspended from a roof made of riot shields, while Agung Kurniawan invites viewers to slip on sneakers he has modified to make uncomfortable in an evocation of his journey from Gwangju toward Ramallah and Cairo to join protests there. [Guardian]