It would be nice if MongoDB provided some way to output results of a standard query to a collection. With MapReduce, this is already possible (and in fact the only way to get to your results). I like to have this, because I am developing an application that allows users to 'chain' several small scripts than perform operations on the database, and each of them has to pass the query result to the next script. The roundtrips of data between my server and the database server take up way too much time, while the data can easily stay within the database server if this feature is implemented. It also seems as if this is not very difficult to implement...