American Express Membership Rewards - Double AMEX SkyMiles on all puchases in July and August

Here is the link, but when you click it, it brings you to a page that says the promo expired 4/15 (obviously, a reference in error to an earlier promo). I hope that link will be updated by the time July rolls around. In any case:

http://www.delta.com/skymiles/about/insider/englishna_current/02/index.jsp

Please note, this post was originally posted in the Delta forum by Carolellen607 on 5/15:

http://www.flyertalk.com/forum/showthread.php?p=4071417#post4071417