Are there any examples of recreating SHODAN's voice effect?

All of this Portal 2 talk has caused me to return to System Shock 2 to hear SHODAN.

Are there any tutorials detailing how that voice effect was made?

Well, first they started by hiring Terri Brosius, who has a truly amazing voice. Then the voice was

accompanied by stuttering, fluctuating voice pitch, shifts of timbre, and the presence of three voices speaking the same words with the constituent voices alternately lagging behind and leading ahead, as well as computer glitches resembling a sound card malfunction.

From the SHODAN wikipedia entry.

Update: also, if you want a good audio-editor package, Audacity is amazing - and open-source.