The SANTA code 40% expired on 12/1. The coupon I used got me 20% (I believe the code was JINGLE, good until January 2011) and got me a 3-year warranty for $39.99, which is still MUCH better than the B&N warranty). You can see all the available coupon codes with their expiration date at RetailMeNot (
http://www.retailmenot.com/view/squaretrade.com)