Appropriately enough, American Express chose SXSW as the place to show a trailer to a movie it is helping produce. The film, Spent: Looking for Change, premiering this summer, is a documentary that tells the stories of ordinary Americans who are frozen out of the traditional financial system. Forced to rely on expensive options like payday loans and money orders, the movie shows how time-consuming and costly it is for an estimated 70 million Americans to move money around and pay bills, tasks that people with bank and credit card accounts take for granted.