OK, so, I appreciate all the GoPro and Action-Cam advice and all, but that isn't really what I was asking about. And also, I like the advice about small cameras, though that too is not my question. I have several choices including P&S and mirrorless. Set that aside for the moment. I'm looking for an access solution that is _easier/faster_ than a) back pocket, or b) handlebar bag. My pre-conception (and willing to change) is that something on my chest would be the best. Ideally it would manage a micro 4/3 mirrorless, but the right solution that only managed a P&S would not be out of the running.
Thanks.