According to the service, 2,241,475 people pledged a total of $319,786,629 USD, successfully funding 18,109 projects. This averaged out to $606.76 per minute. Breaking it down further, Kickstarter revealed that 570,672 people backed two or more projects and 50,047 people backed ten or more projects. 452 generous people backed 100 or more projects (though they may have just pledged $1 to many of them.)
Videogames alone in Kickstarter raised over $83M, though music projects had the most funded projects with 5,067. 17 projects raised $1 million+ in 2012, including such projects as Double Fine Adventure, Wasteland 2, Project Eternity, Elite: Dangerous, and Star Citizen - not to mention the Ouya console.
Not bad for a service that began three years ago.