London is one of the most complex, dynamic and diverse cities in the world, with 8 million residents, over 300 languages spoken in its schools, and some 30 million overseas visitors every year. Reaching out to and connecting all these people with the city's heritage while catering to their many interests, motivations and learning needs is a huge challenge for the Museum of London. This article describes the museum's experimentation with digital technologies, which are proving to be a critical and increasingly important strand within the museum's audience development, community collaboration and learning strategies.