SAS are selling their 20% stake in BMI, they are already in talks with Lufthansa (who own 30% less one share) according to a report on BBC News.
Interesting times ahead, but Lufthansa would have to think carefully on this, am no expert but Competition authorities could tell Lufthansa they either go for BMI or Iberia and not both (as i believe they are interested in IB) - given that they own Swiss and stakes in a number of other European Airlines.