Database-level stats

[pataquets]

It would be nice to iterate on all or some configurable list of databases and send their stats.
Example:

> db.stats()
{
	"db" : "main",
	"collections" : 12,
	"objects" : 10169918,
	"avgObjSize" : 3109.8305005015773,
	"dataSize" : 31626721184,
	"storageSize" : 41310953280,
	"numExtents" : 113,
	"indexes" : 22,
	"indexSize" : 2132815888,
	"fileSize" : 47155511296,
	"nsSizeMB" : 16,
	"dataFileVersion" : {
		"major" : 4,
		"minor" : 5
	},
	"extentFreeList" : {
		"num" : 0,
		"totalSize" : 0
	},
	"ok" : 1
}

What would be the correct statsd metric naming? Which metrics to include/skip?
Would it be an initial requirement from the beginning to make it optional? And to use/have a list of included and/or excluded dbs? Initially, just iterating on all dbs would do fine.
Later, table-level metrics could possibly follow suit.

Although I'm no Go programmer, code is nicely laid out and it will make for a perfect beginner contributor task. This is why I'm asking so many questions.

Should I find time to dive into Go programming :) , I will take a stab at doing ti, but no commitment, atm.