Pleiades is a visualization tool that allows for the exploration of Twitter communities, and an inside look at interesting dialogues and shared conversations. A twitter community is a group of Twitter accounts that often interact and converse. Pleiades can visualize communities formed around a single account (your community) or from taylor made lists.
The current version allows the visualization of networks formed around a single account, or formed by groups of accounts. To perform different queries the application receives a command trough the url. Here are two examples of how these commands work, for a network formed around a single topic, and one formed by a group of accounts.