According to a tip Engadget received, it’s possible. Apparently, some refreshed AT&T retail promotional material has been leaked, and it’s all for a July 24th in store refresh. AT&T stores routinely get display materials ahead of product launches, and the earliest we’re looking at for a possible launch here is September (according to historial promotional shipments to stores), but we wouldn’t be surprised to see that turn into October or possibly even November. Microsoft has only gone on record to confirm that the device series will launch in “holiday 2010” so that’s obviously open for interpretation. With the two largest and hottest mobile operating systems out there constantly covering new ground (Android and iOS), are you still excited to see WP7 take shape?