Features

The world
 * Immersive environment that can mirror the physical world or create past and future worlds (simulacra) . These can be accessed in 'character' like be a fish in an undersea habitat.
 * Avatars that can be human or animal or fantasy characters or objects. they can even have your web cam and other media projected onto them.
 * Scenery that can include photographs and textures created from images in the physical world.
 * Built-in characters to interact with
 * Take (give, buy, sell)
 * Read and view and listen to
 * Communications tools for synchronous and asynchronous, co-located and remotely located avatars and the people behind them
 * Things to collect
 * Tools
 * Ability to both make and do
 * Building tools
 * Scripting language
 * Interactivity through touch and proximity
 * Stigmergy happens