I seem to recall I was just on a flight that had these partners:

DL
CO
NW
AF
KE

and maybe KL

I believe it was a flight to or from ATL, to I don't know where.

It is possible, though I don't recall, that Alaska may also have been a codeshare partner.

I think the flight attendant said something like Thank you for Flying Delta flight ____ operated in conjunction with Northwest, Continental, Air France, Korean Airlines, and the other members of Skyteam.