Apple's Historical 1st Days
07 Jan 2011iTunes Music Store - April 28, 2003 First 18 Hours - 275,000 Tracks Sold iPhone App Store - July 11, 2008 First 72 Hours - 10,000,000 Downloads Mac App Store - January 6, 2011 First 24 Hours - 1,000,000 Downloads (sources: Wikipedia, Apple PR, Apple PR)