The ASSA have a meeting app for mobile devices with information on the various seminars. Just search for “ASSA2013” in your Android or iOS app store. The meeting app has both Android and iOS versions. You can find more details here: http://www.aeaweb.org/assa2013_app.php.
For other mobile devices (or using a web browser on your laptop), there’s also an webApp with similar features at http://ep65.eventpilotadmin.com/web/page.php?page=AgendaCategories&project=ASSA13. If, like me, you’re planning to use it on your laptop with a web browser, bookmark the ep65… link. You can also use the official link: http://ativ.me/assa to go there, but this link only routes you correctly if you’re accessing it using an mobile device.