So you've decided to leverage social media with an application you hope will go viral. Are you prepared to log signups at a rate of 20 per minute, 1,200 per hour and 670,000 in five weeks? Can you handle 50,000 signups in one day? Here's how the Outback Steakhouse restaurant chain, in cahoots with Florida ISV Thuzi and Windows Azure, turned a free appetizer offer into a Bloomin' success--and how others are following suit.