I'm guessing:

* SWUs, but that's a rather "complex" new feature, that might take up to a year to plan and implement (mainly having to do with training).

* Plat threshhold bonuses, every 25k EQM. It sure would be interesting to know what percentage of Plats stop flying NW after making 75K EQM... and you know NW has measured that.

* WC purchases/discounts, based on milage. Believe DL/UA/AA all offer membership with milage (70k miles for 1 year, for top-tier, but that's rediculous!), and it would be nice to be able to apply milage against NW lifetime memberships ($.01/RDM?).

And per the post above... the option of paying to have your photograph added to a WC or Elite card, so that you don't have to show your "governement issued ID" when entering a WC... or when receiving a Plat-specific benefit in Y.

Steve B.