Delta is offering 5,000 SkyMiles per Marriott stay between November 1 and January 31, 2011. Now, the slight twist they’ve added to the promotion is that you need a Delta flight in conjunction with your stay. I don’t know what exactly that means, and neither does the Marriott representative on FlyerTalk. Logic would suggest that you need a single Delta flight during the promotion period credited to Delta in order to earn as many 5,000 mile bonuses as you want, as I can’t imagine they have a way of correlating stays and flights.
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(Tip of the hat to TMtravelWorld)