Here's something that I just received from BJJ black belt and spider guard whiz Elliott Bayev: an amazingly detailed mindmap showing how the various attacks, transitions and variations of the spider guard all fit together.
It's in PDF form and so it's best viewed with Adobe Reader
You can download it - completely for free - at the link below. I think it's a pretty amazing tool that really gives you a taste of how high level blackbelts construct their games:
Ciao
Stephan Kesting
Grapplearts.com