MongoDB is an open-source, high-performance, schema-free, document-oriented database. The goal of the MongoDB project is to bridge the functionality gap between a key/value store and a traditional RDBMS. There is a native Ruby driver for MongoDB, as well as several open-source projects providing additional support for using MongoDB from Ruby. This talk will introduce MongoDB and discuss some of the reasons why MongoDB might be the right choice for your project. It will include an overview of MongoDB as well as detailed examples using MongoDB in Ruby.