The iPad versions of GQ, Vanity Fair and Glamour are all migrating to new apps within the next month, says publisher Conde Nast. The major factor involved is a decision to migrate from a proprietary digital publishing system to one created by Adobe. Adobe would likely have become an industry standard for iPad magazines last summer -- thanks to an ability to cross-compile for different platforms -- but Apple temporarily banned third-party development tools, only restoring developer freedoms under the looming threat of an FTC investigation.