Through July 31, Starwood is offering 1,000 Delta/Northwest miles per stay at select properties. Registration is required. Best of all, this promotion is combinable with the Free Weekend Nights promotion. While this added bonus isn’t a reason to take a trip you otherwise wouldn’t, it’s a nice added bonus when you’re trying to decide between different hotels in a city.
I find it interesting that you can only accrue Delta miles at certain properties, while you can only accrue Northwest miles at others, considering that accounts can now be merged between the two programs.
(Tip of the hat to Loyalty Traveler)