Five years ago, when HubSpot co-founders Brian Halligan and Dharmesh Shah moved into their first single-room office in Cambridge, MA, the term inbound marketing was virtually unknown. Today, a Google search for inbound marketing yields more than three million results, including links to the book Shah & Halligan co-authored and the 50+ awards HubSpot has received, including #1 Best Place to Work in Boston (2010 and again in 2011), Ernst & Young Entrepreneur of the Year (Halligan, 2010 and again in 2011), and Shah’s 2011 Top Technology Innovator honor from the Boston Globe.