https://www.delta.com/marketing/rewardstomiles/

T&C

Bonus Offer: Registration is required in order to qualify for the bonus. After registration, enrollees must transfer Membership Rewards points to their SkyMiles account between July 26, 2007 and September 17, 2007. Bonus miles will be posted up to 8 weeks after expiration of offer. Enrollees transferring Membership Rewards points to domestic airlines will be charged a fee of $.0005 per point, up to $75. This charge is to offset the excise taxes American Express currently pays to the government on such transactions. Eligibility: To participate in this offer, you must be a SkyMiles member and register online by September 17, 2007. Offer open only to recipients of this mailing. Offer is not transferable. Offer only applies to Membership Rewards point transfers. Offer open only to SkyMiles members who participate in the Membership Rewards program. SkyMiles Award Travel: Taxes and fees for Award Travel are the responsibility of the passenger and must be paid at the time the ticket is booked. Award Travel seats are limited and may not be available on all flights or in all markets. Partner airline benefits subject to change and subject to the terms and conditions of each partner. Miscellaneous: Terms and conditions for the Membership Rewards program apply. Visit americanexpress.com/rewards for more information. All SkyMiles program rules apply. To review the rules, please visit delta.com/memberguide. Miles obtained through transfers do not count toward Medallion® or Million Miler™ status. Offer void where prohibited. Additional terms and conditions may apply. Offer subject to change without notice.