Jamie Lee Curtis WAS in Escape from New York
For those that have been asking, because I know it has been a source of much debate, Jamie Lee Curtis, the star of Halloween, was indeed in Escape from New York. She was uncredited and played the Narrator/computer voice.
You can read it for yourself here at IMDB.

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April 15th, 2009 at 7:57 pm
The opening narration is not, as some reported, provided by an uncredited Jamie Lee Curtis. The computer voice in the opening and in the first prison scene is producer Debra Hill. as can be read on the escape from new york trivia on IMDB.com