We've just arrived at the Trinity Rep Theatre in Providence for the Business Innovation Factory 4, a 2-day "conversation, not conference" and collaborative innovation summit. Over the next two days, storytellers (not speakers) will share their tales that exemplify and demonstrate social engagement and deep business value. The lineup is a veritable who's who of movers and shakers in the business of innovation and social entrepreneurship (doing good while makin' bank). This morning's highlights include a welcome from Saul Kaplan, and presentations by Marc Ecko of Marc Ecko Enterprises and Sweat Equity Enterprises, and Acumen Fund founder Jacqueline Novogratz. This afternoon: Richard Saul Wurman and more.

We'll give you our full wrap-up at the end of the day, but in the meantime, follow the BIF-4 action on Twitter!

"My reason for coming is simple: to hear great people," says Bruce Nussbaum, BIF-4 co-host. The Business Innovation Factory model is unique, conversational, and casual. Their website even advises attendees to "leave the suit at home."

The BIF model is based on four simple tenets: Think, Learn, Do, and Connect. BIF is a nonprofit organization launched in 2004, founded to enable collaborative innovation and create a platform where public and private sector partners can join forces to focus on "big-win" projects and transformative ventures.