On the EngineYard site today there's a new podcast released with Elizabeth Naramore interviewing Derick Rethans (of 10gen) about MongoDb and the OpenStreetMap project.

Derick gives a little background about himself (including being a PHP evangelist for 10gen) and how he ended up working with MongoDB. They talk about how MongoDb is different and some of the involvement he has in contributing to open source projects and the OpenStreetMap project.

You can listen to this latest episode either via the in-page player or by downloading the file directly.