Emacspeak / Emacs W3 Browser / Emacs, and how they fit together:

"Implementation --Emacspeak And W3"
"Emacspeak -Toward The Speech-enabled Semantic WWW"
"A Gentle Introduction to Emacspeak"
Emacspeak User Guide

specific aural-css documentation in w3

quick reference to keystrokes to get emacs/w3/emacspeak working

Getting Emacspeak to work with specific voice synthesizers: IBM ViaVoice