I haven't kept up that closely, but aren't they being absorbed by BA (IAG)? If that's still on, have they announced that the BMI FF program will just disappear or also be absorbed by BA?

If all your future flying is going to be domestic U.S., it might not make much difference but you could try AA to see if they would give you a match to AAdvantage. If your flying is going to be almost exclusively ILM-LAS, I'd say US is the best option - a short hop to CLT then on to LAS. It's just a shame to have to start from scratch because US doesn't do status matches.

Jim