Sarah Palin's recent web video making a pitch to conservative women may have again shifted the political spotlight to the former governor of Alaska, but more than a half dozen other GOP hopefuls are toying seriously with a presidential run this summer. ......................................................... Still, few express much regard for Palin's ultimate chances. One adviser to Mitt Romney, the former Massachusetts governor, and, by traditional standards, the putative 2012 frontrunner, says of Palin, "She's not a serious human being." Another Romney intimate warns, "If she's standing up there in a debate and the answers are more than 15 seconds long, she's...