Northwest Worldperks is offering (registration required) 1000 miles for shopping through their portal if you haven’t done so in the past 3 years. Any single purchase made through March 31 should qualify, so either make a purchase through them that would have otherwise been made or find yourself a truly inexpensive ($1ish) item, or buy a gift card with free shipping for something you’ll spend on later.
Purchases from FTD, Teleflora’s Flower Club, 1-800-FLOWERS.COM, Bose, Sealy, 1-800WINE.COM and Vinesse do not count towards the bonus.
If you aren’t sure whether you’re eligible because you don’t know whether you’ve made a purchase through the Northwest mileage mall during the past three years, don’t worry. Northwest knows — if you aren’t eligible for the promotion it won’t let you register. So go ahead with the registration, you’ll soon find out.
Hmm. NWA let me register, but I know that I made a purchase through the mall back in April of last year (it even shows up in my account history), so I’m not sure that getting past the registration gate assures that you’ll earn points. I’m going to give it a try anyway.
This flyertalk thread tells you how to get those 1,000 miles for a $1 purchase.
http://www.nwa.com/offers/newmallshopper/?omni=em.wdan.20090225.Intro2.NewWPMallUser