It has been a very busy year and I am super excited about the Office and SharePoint Server 2013 developer experience with apps.  Ludovic Hauduc has made a great post about apps on the new officeapps blog.  You can check it out here: http://blogs.msdn.com/b/officeapps/archive/2012/07/17/introducing-the-new-office-cloud-app-model.aspx