I am making a site that will be best utilized with a layout similar to Scribd, and (like Scribd) I am currently coding it in Ruby on Rails. However, this is taking me a long time and due to being a full time student I will not be around to maintain it and constantly be on the look out for bug fixes and to expand the site. Is there a CMS that will provide a layout (themes possible of course) and behavior like Scribd? If it uses OpenID or gives me the option to, that's even better. Thanks.