If I write a gauge called: foo.bar.gauge, but stop using it, StatsD will continue to push the last known value into Graphite on every flush interval. I should be able to, through a simple interface, delete a metric from StatsD. This is the clean way to avoid having to restart StatsD in order to clear out the local memory.
Never mind, just read the code for the admin interface and found some nice commands: deltimers, delcounters, delgauges
Oh yeah, totally forgot about those when you asked. Sorry about that.