native Ganglia support for monitoring MongoDB metrics

We're using MongoDBs in the several production environments (thanks for the product!). Of course, we need to monitor many metrics which mongostat can output.

There're some way to do this, but basically need to write the plugin for each monitoring system.

If MongoDB supports recommended monitoring tool, and has the functionality to output the metrics natively, that would be nice for system administrators.

Especially we're happy if it supports Ganglia, because we use it to monitor Hadoop systems co-located with MongoDB. Also, it has libganglia, and would be easy from C/C++ applications.