In financial services, employee communications must be archived for seven years and all client account information safeguarded. That makes using social networking tools for business a challenge, but Vanguard's Enterprise 2.0 initiative is overcoming the obstacles. Its Crew Think program uses social media to solicit ideas from employees. It recently collected several hundred ideas for themes that should be covered in Vanguard's constitution--the core principles used to govern the company. Other E2.0 efforts include allowing the company's email and calendar on personal mobile devices, with more than 2,300 employees doing this. A multimedia center lets employees create videos, animations, and webcasts. It's making extensive use of videoconferencing, which by itself has saved more than $2 million in travel costs. Next up: Vanguard will expand use of some E2.0 tools to its clients.