WorldPerks members can still earn up to 40,000 miles when signing up for three Northwest communication partners (choose from MCI, EarthLink, AT&T Worldnet or Nextel), but only if they do so before Dec. 31.

Sign up for two participating partner offers and receive up to 10,000 miles for each, for a total of up to 20,000 miles. In addition, you will receive 5,000 miles from Northwest, for a total of 25,000 miles. Sign up for three participating partner offers and receive up to 10,000 miles for each, and Northwest will tack on 10,000 miles for a total of 40,000 miles.