Our User Assistance stars have just posted some brand new content to help new users to Project Online.  The new Project Online getting started articles can be found at http://office.microsoft.com/en-us/project-server-help/get-started-with-project-online-HA102858793.aspx and walks you through the Project Online sign-up, adding your people and creating projects.  Thanks Sonia and all the folks in the review cycle who helped make this happen!

A screen shot from the Get Started with Project Online page - showing the 1,2,3 steps of sign-up, add people and create project