No mic jack?

I was (trying to) watch some videos while on the train tonight (the train WiFi was just too slow) when I realized there isn't a mic jack on the Cr-48.  There is an integrated mic next to the camera; but, when wearing a headset, it would be preferable to have a jack for the mic on the headset.  Not exactly a major issue, but it couldn't possibly be that difficult to include two jacks for a headset.