Here at the DEMO conference in Santa Clara, VentureBeat's Matt Marshall asked Twitter founder Jack Dorsey about his regrets, "What can the 67 companies here learn [from your experiences with Twitter]?" Marshall asked. Dorsey, who is still Chairman of Twitter, put context around his answers, "Twitter has some interesting scaling issues, massive spike around an event" and then went on to bring up the following more relatable points. * We were a company built around communications, but we weren't communicating with our users, not letting them know why we were going down. Once we started blogging about it, we engaged users.