I think most of the online worlds will eventually swing this way – Multiverse is in beta “Make a complete Massively Multiplayer Online Game (MMOG) or virtual world for less money and in less time than you could have dreamed possible. Participate in the game industry’s most exciting frontier. Build the features that make your game unique, leveraging the expertise of the networking and infrastructure experts who helped build the web. Deliver your vision to a built-in market of players–without having to ask a publisher’s permission or give up your intellectual property.” [via] Link.
Make your own MMORPG