POOF... Gone! Congratulations to those who got it (including myself who will be going on Monday!)..!
AND A BIG THANK YOU TO jupeter! ^

Edited to add that it is gone from Travelocity where I booked my ticket...
They probably have some more advanced methods of finding these error fares now! As of this edit it is still available at selected internet sites, but please check further on in this thread for updated info.