Huddle Project Management

Huddle is a network of secure online spaces that combine powerful document, project & team tools with the simplicity of a social networking site. Collaborate on documents (with access control, version management and approval workflow,2009-05-01), create project milestones and share ideas online. Fully hosted, no special software required. Free package (1 project huddle, 5 users, 25MB of storage) and several paid subscriptions available.