The code is good until July 22 and is only good for one use, so it's first come, first served. Here's the code:
Here's the fine print on the code:
"One Coupon per transaction. Valid only at Borders.com. Not valid in stores. Excludes previous purchases, gift cards, eBooks, digital downloads, shipping, and all electronics, including the Sony® Reader and the ZuneTM. Promotion code good for single-use only during valid period. Void where prohibited by law. May not be combined with other discounts or sale pricing. Any other use constitutes fraud. Not redeemable for cash. Valid through 7/22/08."