Already posted this link over on the Project Support blog – but wanted to be sure no one missed it. The brand new Project Online getting started articles are at http://office.microsoft.com/en-us/project-server-help/get-started-with-project-online-HA102858793.aspx and these walk you through the Project Online sign-up, add people and create projects. Thanks to Sonia and all the folks in the review cycle who helped make this happen!
*** Update 10/6/2014 - new link http://aka.ms/ProjectOnlineGetStarted and the page doesn't look quite like that any more... ***
The link above to the getting started article is broken as of 9/30/2014
Thanks Kelly - we are working on it. Some new links and redirects aren't hitting them quite right.
I've updated the links to the new location - thansk again Kelly!