With the release of Project Butterfly, the technology preview of Project Draw has ended. At the time of Project Draw's graduation (January 21, 2010), we had a large community of users using Project Draw, so we kept the servers up and as they were. On March 22, 2010 we retired the servers too. Thanks to everyone who participated in the Project Draw technology preview and gave us great feedback.
UPDATE: The Project Draw service has been restored: http://labs.blogs.com/its_alive_in_the_lab/2010/03/project-drawservice-restored.html