The startup Subtext offers a new social eBook reading experience to iPad users, by making margin notes interactive and adding context to the eBook experience through social networking and web content.

Users can engage in conversations with friends, community members, as well as authors and experts. Readers can get author, expert, and community information, contribute their own thoughts, as well as add and explore links to relevant articles, images, and multimedia content.

Subtext Video on Vimeo.