Hi c_d,
After searching my inbox, I found out that I have not received an individual e-Mail stating that the relations have been ended by PP, but from DL.
PP was announcing this in its "Lounge Updates" only, if I remember correctly.
I checked mine, and in the July update, there was a special announcement:
Special Announcement
Delta/Northwest have unfortunately chosen to no longer participate in the Priority Pass lounge access program effective
1 September 2009. If traveling beyond that date, be sure to select another lounge as you’ll find other lounge partners who will continue to welcome Priority Pass members at most of the affected airports. We remain committed to finding alternative lounge partners in the US and around the world to provide the most comprehensive lounge access program.
Cheers,
GenevaFlyer