What does this have to do with Apple and Mac users? Well, although the Apple Store is not a selected merchant (it doesn't take PayPal, but it is offering free shipping today), lots of stores that sell Mac products or accessories are on the list. NewEgg.com carries Macs, iPods, software, RAM and accessories; 20% off on a $200 iPod Nano, with free shipping and a free holster, is an unbeatable discount. eBags.com has a great selection of laptop bags (the 20% PayPal cash back is enough for me to bite the bullet and order the Tumi messenger I've been eying for ages). BarnesandNoble.com has lots of great books about Apple and Apple products and Overstock.com often has great deals on older Apple products and on iPod accessories.
If you use PayPal and have been waiting for some deals for gifts for yourself or others, right now might just be the time to start shopping.