Amazon.com has introduced a new way for sending its gift cards to people on Facebook.

People can now connect to their Facebook account on Amazon and create a personalized gift card that will be sent to the recipient’s Facebook Wall.

Target said today it will be the first retailer to sell Facebook Credits gift cards at all of its 1,743 stores and on Target.com beginning September 5.

Amazon.com has introduced a "Textbooks Trade-In" program, which allows people to exchange used textbooks in return for an Amazon gift card.

Users can search for the book on Amazon they want to trade and view how much credit they will receive in the form of a gift card.  If the offer seems reasonable, users can print a pre-paid shipping label and put the book in the mail.

Gift cards are expected to be popular this holiday season and online retailers who are not prepared to handle post-holiday online card redemptions risk losing customers.