What do you want to know about LUKS and/or dm-crypt?

A little while ago I began putting together a knowledge-base article to cover a thorough (but basic) introduction to dm-crypt/cryptsetup + LUKS, because I couldn't find ANYTHING. We have some great documentation but it doesn't make clear the things I wanted to explain to my customers.

So this started as a mid-sized KCS article -- What is LUKS disk encryption and how can it be implemented? -- and then evolved into two pieces: the short KCS article with a few links and the larger All about LUKS, cryptsetup, and dm-crypt article that is linked from there.
 

I'd like to get some feedback on that larger article. Is it clear? Did you learn new things from it? Are there any big holes in what it covers? Anything cool that you'd like to add to it?

Thanks!