This is a feature-complete (though not performance or reliability complete)
implementation of map/reduce for the go language on the appengine platform. It
make heavy use of task queues to provide load scaling, and a sample application
is available from http://github.com/pendo-io/mapreduce-sample.
This is an BETA release of this package. While it is being used for production use it certainly still has shortcomings and bugs.