I can reply to this one Ottawamom, I just got mine and it was an RFID credit card style (exactly the same as one I had bought through CAA a few years ago) and was able to enter the number on MDE without any problem. Incidentally, I actually added it to my husband instead of me (for a bunch of reasons relating to FP+) and no issue with it not being the AM cardholder, which is a problem with Aeroplan, I think.
And argh! My Sobeys from last Wednesday (the 17) still haven't shown up, but my Metro from the 20 did. Will check throughout the day since pigletto said some appear throughout the day.
And yay pigletto on getting your cards!! It is awesome to have them right in your hands