Photo by Patrick Dentler Barack Obama "Texas Countdown to Change"Saturday, November 17The Backyard (13101 W Highway 71)$25 General, $15 Students, 3pm[info] | [tickets]Democratic presidential hopeful Barack Obama dazzled over 20,000 Austinites last February at his Auditorium Shores rally, and this weekend he aims to do the same. Tickets to this Saturday's "Texas Countdown to Change" rally at the Backyard are still available for $25, and even cheaper ($15) if you're a student. Still, if you......