Hooray - thanks to Flyertalk I found out about this promotion! -- I guess I would have seen it eventually on the Marriott Rewards promotions pages but, glad to know earlier. Here is what we got:

Platinum spouse: Was preregistered; 35,000 after 20, 25,000 after the next 15, for 50,000 total. Use Visa Card

Silver spouse: Not preregistered; 2500 points per stay starting with second stay, up to 25,000. Use Visa card.

Not sure these fit us the best, we'll have to see - like some others, would have liked another chance at double elite nights.