Here is the official interactive tour for the American Express Centurion benefits. This is the non-public "black card" tour that highlights everything the card offers. It is for last year but the benefits haven't really changed since then. It is a big file (4.7 mb) and tells you quite a bit of information about what exactly this card has to offer.
Centurion_eGuide.exe
Special thanks to The Fuzz for stumbling upon this.