Art! Who goes there? Now: we do. In the first installment of our Sunday art column, Kelsey Keith's got a few ideas for some people who think they know what art's good for New York City's taxis.

Oh, the art world! Like any insular set of people, it's always swirling with the best rumors. The mystery that arty people are currently exploring: has Matthew Barney left his hipster elf wife Björk for sometimes-lesbian painter Elizabeth Peyton?

You can't fault the New Museum for trying to capture a bit of the election buzz. The institution unveiled an oil portrait of Michelle Obama today by Elizabeth Peyton, which features the First Lady-to-be listening to her husband address the crowd at the Democratic National Convention with daughter Sasha sleeping in her…

♦ The opening of Elizabeth Peyton's New Museum exhibition on Tuesday was full of her friends and fans like Marc Jacobs (with boyfriend Lorenzo Martone, left), Glenn O'Brien, Amy Astley, Peter Brant and Stephanie Seymour, Hope Atherton, Cecily Brown, Rachel Feinstein and John Currin, Alex Katz, Kiki Smith, Gavin…