The keynote speakers this year include humorist Baratunde Thurston, "cyber anthropologist" Amber Case, Code for America founder Jennifer Pahlka and futurist Ray Kurzweil.

CNN: The changing culture of SXSW Interactive

Today geographic information systems leader Esri announced its acquisition of geo-locating platform Geoloqi, the 2010 FORBES Name You Need To Know company led by 26-year-old CEO Amber Case.

FORBES: Amber Case On Geoloqi Acquistion: 'Esri Is A Beautiful Match'

Police never issued an Amber Alert on either case because they had no specific evidence of an abduction.

WSJ: Lapse in Missing-Persons List Questioned by Cleveland Officials

But he said the case might not have been solved Saturday night without the alert citizen, as well as the Amber Alert system that publicizes news of missing and endangered children on highways, in police stations and around the United States.

CNN: 2 Georgia boys -- missing for 10 days -- found safe in Texas