I've been trying to follow docker since I first saw it here on HN and I love the concept. I think I have a fair idea of what it is and how it works, but I think it will take some time for me to really wrap my head around the concept of containers vs VMs, though I think I have a decent grasp of the basics.
I think what will really help, and what I think is sadly missing from this list, is a good series of examples of what I could accomplish with docker, and how I would go about accomplishing those things.
Or, it may be that docker is not necessarily aimed at me, or is currently out of my depth.