Hey duaneb, I'm running marketing for Docker since the begining of the project. I have a budget close to 0 (apart for pizzas and beer for Docker meetups in the Bay area :)

That being said in re difference between Docker and LXC/Jails/Zones

* Docker is a whole platform, that makes containers easy to use and portable.

* We’ve added security, versioning etc...

* Our platform has an index of images, where they can be shared and downloaded.

* In addition to the index we offer image management functionality: creation, changes, storing, sharing, updating, etc of images...that at runtime, run inside containers

Hope this helps