Guide Redux: Pointers

This is super, super WIP, but I'm going to go get lunch for a while, and figured I'd toss my work up here in case anyone wants to see my work as I do it.

This contains a new introductory section explaining the basics of pointers, and some pitfalls that Rust attempts to solve. I'd be interested in hearing how my explanation is, as well as if this belongs here. Pointers are such a crucial concept, I don't mind having a beginners' section on them in the main docs, even though our main audience is supposed to understand them already. Reasonable people may disagree, however.
Here "best practices" discusses ownership as an important concept but I don't think it's ever mentioned above in the current version. Is it safe to assume a reader will have seen that in a previous guide before reaching this point? Should this at least reference an in depth discussion of what ownership means and why it matters in Rust?