As I have promised, I'll try to give back what I have learnt here to the community, by writing a series of articles about how to build an LED cube. For now, I've written a very long introduction 
http://iqjar.com/jar/building-an-8x8x8-led-cube-introduction/
I plan to write 3 more articles, one about building the cube itself, one about putting together the driving circuit and one about writing software for it. These will take time, because I'm doing it in parallel with actually building the big, 8x8x8 cube, so that the experience is fresh while I'm writing about it.
I'm trying to explain things on a very simple level, suitable for beginners like I was a few months ago.