If you haven't already, you should check out DZone's latest Refcard, titled "MongoDB: Flexible NoSQL for Humongous Data ." This card is a handy reference for anyone who plans on using 10gen's popular open-sourced NoSQL solution. The Refcard was authored by Kristina Chodorow, a 10gen employee who has been working with Mongo for the last 5 years and co-author of O'Reilly's MongoDB: The Definitive Guide. Kristina was kind enough to answer a few questions about the Refcard. Enjoy.