Second hand info: (first hand in the Boston Phoenix (day unknown))
SPEED CUBING COMPETITION
Date: Saturday, July 25, 1981
Place: Jordan Marsh, Burlington, Massachusetts
Times:
1100-1500 3 minute qualifiers 1530-1800 Registration and Playoffs 1800-.... Finals
First prize is N hundred dollars, where N is about 5.
(Sorry for the lack of info, we got this over the phone in a
hurry.)