Only the MongoDB server is AGPL licensed, all of the official clients are Apache licensed; you're free to use mongo for commercial hosted services without getti

Only the MongoDB server is AGPL licensed, all of the official clients are Apache licensed; you're free to use mongo for commercial hosted services without getting a commercial license from 10gen provided that you publicly release any changes that you make to the server codebase - you're never required to release the code of your actual application (provided that you're using one of the official clients).