Its now possible for MUDs to create immersive virtual worlds, with sound, hypertext, 2D and 3D graphics. With minor modifications, any MUD can incorporate these new media types. Chaco's Pueblo protocol is well-documented from the Pueblo Help menu item. As of May 1996, seventeen MUD servers support the Pueblo-protocol and more are on the way.
Pueblo is free for non-commercial use.
Pueblo 2.01 is currently released for Windows 95, Windows NT, and Windows 3.1. It's not inline. It just plugs itself in as the Telnet client.