YES !

Just got my email :

Dear Mr skywalkerLAX,

Thank you for contacting Northwest Airlines in regard to upgrading your
WorldPerks account.

A variety of criteria, including information from your American Airlines
mileage summary, is considered when evaluating requests from members to
match elite status from another airline. After reviewing the
information provided to us on your AAdvantage account, your Northwest
WorldPerks account has been upgraded to Platinum Elite status. This
one-time complimentary membership upgrade will remain valid through
February 28, 2009.

Due to the timing of your 2008 complimentary Platinum Elite upgrade,
please be advised that your Platinum Elite membership will be continued
through the 2008 program year - March 1, 2009 through February 28, 2010.
You may expect your credentials for this program to be delivered prior
to March 1, 2009.