Phoenix-based SkyMall - and is parent company Xhibit Corp. - have filed for bankruptcy protection after facing a liquidity crisis and seeing two major U.S. carriers say they were going to stop carrying the catalogs with quirky gifts. Delta Air Lines stopped carrying SkyMall's catalog last year and Dallas-based Southwest Airlines will stop the practice this year, according to bankruptcy documents and a declaration by Scott Wiley , CFO and Acting CEO of Xhibit.