InterContinental has had this promotion already since May 1st and it is valid until the end of July. You will get 15K bonus Priority Club points for staying 6 nights in the Americas and Caribbean (excluding the InterContinental Alliance resorts), & Gold status with Priority Club rewards.
You can register for this promotion at priorityclub.com/register by inputting the promotion code 2933.
If you are going to have 6 stays at InterContinental hotels, it would make sense to sign up for the Ambassador Program and get Gold status and other benefits immediately.
You can also get 10% discount off of the Best Available rate by booking the IDICH rate code and paying using an American Express card. I am going to be in South America in July for couple of weeks, and planning to spend few nights at the InterContinental properties in Buenos Aires.
Here are the terms and conditions of this promotions that appears to be somewhat contradictory. The promotion is for 6 nights and not 3 etc.
Offer valid when you register, book and pay with any American Express Credit or Charge Card. Registration can be completed at www.priorityclub.com/AMX15k. Fulfillment of the offer is the sole responsibility of the participating American Express merchant. Offer is not redeemable for cash, is not valid on previous stays or existing bookings and cannot be combined with any other promotions/offers/savings. Limit one offer per Cardmember. Offer valid based on single occupancy in a standard room. Offer does not include tax or resort fees. POINTS: Must be a Priority Club Rewards member and must register member number in advance to participate in this promotion. Bonus points will be awarded after the three qualifying nights between 1 May and 31 July 2012, at InterContinental locations in the U.S., Canada, Mexico, the Caribbean, Central and Latin America (excluding InterContinental AllianceSM Resort properties). Three qualifying nights do not have to be consecutive. 5,000 bonus points awarded after three qualified nights. A stay is qualified when paying qualifying rates, which include most business and leisure rates. Only one room per member per stay will be awarded the applicable bonus points. No retroactive points will be awarded for stays prior to registration. You must be a points collector with a preferred alliance in order to collect points. Only points will be awarded for this bonus point promotion. No other frequency/partner credits will be issued for the bonus points. Subject to standard Priority Club Rewards Membership terms and conditions and earning structure, which can be obtained by visiting www.priorityclub.com. This exclusive offer is valid for original recipient only. 10% off Best Flexible Rate at InterContinental properties: Some restrictions apply and rate is for InterContinental Hotels & Resorts in the U.S., Canada, Mexico, the Caribbean, Central and Latin America (excluding InterContinental Alliance Resort properties). American Express Rate Code IDICH must be used at time of booking in order to secure 10% off Best Flexible Rate. Specific discounts may not be available at all hotels. Offer does not apply to negotiated rates for groups of 10 or more, travel industry rates or employee rates. The rate offer does not qualify for InterContinental’s Best Price Guarantee. Program terms and hotels subject to change without notice. ©2012 InterContinental® Hotels Group. All rights reserved. Most hotels are independently owned and/or operated. POID ABOH:0001