another email i received:

BORDERS REWARDS EXCLUSIVE OFFER VALID THROUGH 10/13/08
30% Off the List Price of One Item with $10 Purchase

Borders.com Promotion Code: ERP5253K

Valid with Borders Rewards membership only. Certain exclusions apply. Coupon cannot be combined with any other offer, including but not limited to "3 for 2," "Buy 4, Get 5th Free" or "Buy 1, Get 1 Half Price" offers. Excludes previous purchases, non-stock special orders, gift cards, newspapers, magazines, comics, coupon books, eBooks, digital downloads, self-publishing programs, Rosetta Stone® software, shipping, and all electronics, including but not limited to the Sony® Reader and the Zune™. May not be combined with other coupons, sale pricing, or corporate, classroom, or other group discounts. Original coupon must be relinquished at time of purchase. Single-use coupon. One coupon per customer during the valid period. Void if copied, transferred, and where prohibited by law. Any other use constitutes fraud. Cash value .01¢. Not redeemable for cash. Valid only in U.S. stores through 10/13/2008 and at Borders.com through 10/13/2008 midnight EST.

here is the link for the coupon:
http://www.bordersmedia.com/coup/coupon30w101007.asp