Via Randy Petersen’s blog, Mileopoly:
I’m predicting that early February will be when we see the start of their database merger with both programs allowing members to convert miles from one program to the other — without a transfer fee. This full mileage transferability is not as easy as it looks since to squeeze the pennies, Delta has opted to do the technology work in-house.
Furthermore, as Randy goes on to say, take full advantage of the separate programs until they’re fully merged. They have different award levels, and you can save quite a few miles by redeeming with one program instead of the other in some cases.