Lots of cynical comments above but lets be honest, it's really good news for the RAAF and shows a confident future for the MPA Force. I understand that capability will dip initially with the 'off the shelf' sensors that come with the package not being as good as what the AP-3C has but that's inevitable.
Get the airframes in first and upgrade over the next decade to a decent radar, ESM, acoustic suite etc...
Oh, and if the RAF stay out of the game after our next defence review, I suspect Edinburgh will shortly become home to a new set of P-8 instuctors with civilised accents!