Borders is offering free shipping on all online purchases right now with coupon code ISG5234F. That's handy if you just need one or two things, although free shipping tends to be pretty slow. There's also 50% off priority shipping with code PRIORITY, if you need it faster.
And their Cyber Monday special continues: BOGO 60% off. Depending on how you played it, that could average out to about 30% off two items, but personally I'm holding out for the next 40% off coupon. Go on, Borders. Take your time. My disposable income and I can wait.
UPDATE: Here's a 30% off any item coupon, good through December 7.