1. An apparatus providing for virtual communication and collaboration, the apparatus comprising: a collaborative virtual environment application executing on a processor within a distributed data processing system and accessible to a plurality of users through one or more client systems communicatively connected via a network, the collaborative virtual environment application providing a persistent virtual world represented as a grid of an interconnected set of locations each divided into a set of zones and each having an assigned context, the users of the plurality of users simultaneously and continuously perceiving and interacting with the persistent virtual world through a user interface provided to the plurality of users through the one or more client systems, the collaborative virtual environment providing each user of the plurality of users with a respective avatar representation for navigating and interacting with each other user of the plurality of users and objects within the locations of the persistent virtual world; a shadow module executing on the processor and implemented within the collaborative virtual environment application, the shadow module providing a first user interface element implemented within the user interface for each user of the plurality of users through which a first user of the plurality of users can create and leave a shadow object representation of the avatar representation for the first user within a zone of the set of zones of a location of a subset of the set of locations when the avatar representation for the user is currently located in that zone, the shadow object representation of the avatar representation for the first user persisting in the zone after the avatar representation for the first user has navigated away from the zone, the shadow module providing a second user interface element implemented within the user interface for each user of the plurality of users providing a second user of the plurality of users with one or more selectable options for corresponding with the first user when the avatar representation for the second user is located in the zone with the shadow object representation; and a navigation module executing on the processor and implemented within the collaborative virtual environment application, the navigation module providing a third user interface element implemented within the user interface for each user of the plurality of users to specify a respective set of navigation settings, wherein the navigation module automatically directs the avatar representation for each user of the plurality of the users to traverse the set of zones of a respective subset of the set of locations of the persistent virtual world in a particular order of locations, to traverse particular corridors more frequently than other corridors, and to traverse particular corridors at particular rates, wherein the navigation module determines the particular order of locations for each user according to the respective set of navigation settings specified by the user, and wherein the respective set of navigation settings for each user of the plurality of users includes a level of expertise in the assigned context for each location of the set of locations, wherein the navigation module is configured to influence each user's avatar to traverse corridors for which each user of the plurality of users has specified a higher level of interest and expertise prior to traversing corridors for which a user of the plurality of users has specified a lower level of interest and expertise, to traverse corridors for which the user of the plurality of users has specified a higher level of interest and expertise more frequently than corridors for which the user of the plurality of users has specified a lower level of interest and expertise, and to traverse corridors for which the user of the plurality of users has specified a higher level of interest and/or expertise at a slower pace than corridors for which the user of the plurality of users has specified a lower level of interest and/or expertise, wherein in response to the user of the plurality of users specifying a same level of interest for the topics of more than one corridor, the navigation module directs the user's avatar to traverse these corridors in the order of the associated topic for which the user of the plurality of users has specified the highest expertise level to the associated topic for which the user of the plurality of users has specified the lowest expertise level, wherein in response to the user of the plurality of users specifying a same level of interest and the same level of expertise for the topics of more than one corridor, the navigation module directs the user's avatar to traverse these corridors in a randomly or pseudo-randomly generated order.