I just used $600 of gift certificates from Giftcertificates.com through Greenpoints (12,000 points) to buy 3 AA tickets.
Bonus! - The AA agent told me that for some reason they can't figure out, these tickets are not charged US Tax if bought with the gift certificates. Saved me about $40, plus the $15 free from Giftcertificates.com!
I love this board!