Yup, mighty strange. In some markets (ATL - SEA or DTW - SEA) I can get NW flights to show up with a LOT of work as BodiKa described. In other markets (MKE - DTW, DTW - AMS) I can not get NW or KL flights to show up period. It will be interesting to see if Expedia says something about this or if it is just some kind of database problem and suddenly is corrected.