Here's Chris Hayes's response that got the whole flowchart thing started.
The point of the whole exercise is to demonstrate that (a) the public option only affects a sliver of the American public, and (b) the basics of health care reform just aren't that complicated. You can resolve the question of what's going to happen to your health care by figuring out (1) if you're currently on a government program [primarily Medicare & Medicaid, but also the VHA, Tricare, etc.], (2) if you have employer-provided insurance, and (3) how much money you make.
Also I recommend this clip on the mountain metaphor.