From Reuters: Google offers team web site publishing service http://www.reuters.com/article/technologyNews/idUSN2750708620080228

Google Sites  a simple web site publishing tool for team collaboration, along the lines of Microsoft's SharePoint. Libraries could use the software to 'organize and share digital information such as Web links, calendars, hotos, videos, presentations, attachments and other documents...' Google Sites can be published to the world as well as only used within the team.

This is free to users of Google Apps. More information on Google Sites at this page: http://sites.google.com/overview.html