I don't think that is correct. Version 2.2 (beta) has database level locking, but that was the hard part. Collection, and document locking are coming after acco

I don't think that is correct. Version 2.2 (beta) has database level locking, but that was the hard part. Collection, and document locking are coming after according to this talk by the CEO Dwight Merriman. (http://www.10gen.com/presentations/concurrency-internals-mongodb-2-2 http://www.10gen.com/presentations/concurrency-internals-mon...)