Here's an excerpt from the email I got:
20% off any order* IN ADDITION to your member discount!
COUPON CODE: -------
* Coupon can be used MULTIPLE times per customer. Subscriptions, gift
certificates, and endowment gifts cannot be present in the order in
order to qualify for the coupon discount. Expires 12/31/07 @ 11:59 P.M. US
MOUNTAIN TIME. Quantities limited to stock on hand.