Log all hubot output to debug log?

I was hoping to build something on top of hubot's log (a twitter integration) and I noticed that while hubot's logging everything he hears he's not logging everything he says.  If he were logging his own .send() text then I could very easily hook into that.  What do you think?

cc @joshwlewis

btw thanks for this library from #memtech on freenode :beer: