My Introduction to MongoDB presentation given on March 10, 2011 at the Central Texas .NET User Group. I incorporated a lot of what I leaned from the MongoAustin conference.
The target audience is technical people (developers) who have experience with relational databases, but have never looked at MongoDb before. It covers all the basics but also several advanced topics like sharding and replication. I didn't modify my slides much from the last presentation, but I did cover a lot of material not on the slides.