"John is the guy behind the popular mongoDB ruby ORM Mongo Mapper." If you're looking at using MongoMapper in a Ruby project, be sure to take a look at Mongoid

"John is the guy behind the popular mongoDB ruby ORM Mongo Mapper." If you're looking at using MongoMapper in a Ruby project, be sure to take a look at Mongoid (http://mongoid.org/ http://mongoid.org/) first, it seems to have moved quite a bit faster than MongoMapper and uses a lot of the good stuff shipped with Rails 3 like validations, callbacks, etc.