So, I was just on Twitter when I came across the following news: Jack Dorsey, the 34-year-old St. Louis native
who helped found the social-media tool is the subject of a Vanity Fair profile
But the article isn't about Twitter. It's about his current project, Square
, that allows merchants to accept credit card payments via their smart phones. Oh, and here's what I learned about Square this afternoon, from Jack Dorsey himself.