MongoDB, an Open Source Document Database from 10gen is, from all NoSQL databases, probably the closest in concepts and usage to SQL databases. Still, the Document oriented approach has quite some appeal to web developers and also MongoDB promises to scale a lot better than your average SQL database. Ruby bindings and Rails integration libraries are currently maturing and there are quite a few people using this combination in production. This talk will gloss over the general concepts behind MongoDB usage and then show the various ways of using it in your Ruby and Rails Projects.