Knowcase – Collaborative Group Notebook for Business
http://knowcase.com/

A collaborative group notebook for business. Brainstorm, take notes and track todos. Organize and share information with your team. Quickly save ideas, notes, todos; Knowcase is distraction-free. Share and collaborate with your team, customers or the whole world. Arrange information in a hierarchy, just like folders on your computer. This has been added to the tools section of Research Resources Subject Tracer™ Information Blog.