A vibrating dildo was used for the song Human Sacrifice to get a poor-man's E-bow effect.
The original device we used was made of a perfect plastic that allowed it to bounce well off of the guitar strings while maintaining a full sound.
Sadly, it seems to have gotten left on stage after a gig and someone stole it.
A vibrator has been used on later works by by James Britt (on the song TR3) and Neurogami (on the track Morgen)