The Office and SharePoint 2013 products are beginning to appear on the MSDN subscriber download pages - http://msdn.microsoft.com/en-us/subscriptions , including Project 2013 and SharePoint Server 2013. I guess Project Server 2013 will be following shortly. *** Update - Project Server 2013 now available *** If you have a subscription then no time like the present to start looking at the new products. Remember, the MSDN Licensing is per-user and is to design, develop, test, or demonstrate – not to be used for production use.
To give you a head start the best single link I can give you is to Christophe’s blog http://blogs.msdn.com/b/chrisfie/archive/2012/09/18/recent-content-about-the-new-project-project-online-project-professional-project-server.aspx where you will find plenty of other links to more content than you can shake a stick at.