I already have friends to fly with on 360 and my PS3 is hogged as a Netflix box in the living room, so the choice was pretty simple for me. I'd say get this game on 360 for the benefits of Live and an established Ace Combat community and get Starhawk on PS3.
What a drag. I just purchased an XFX 6870 from Newegg at the start of this month, but I would've waited to jump on this deal had I known. Maybe I should just e-mail Newegg and see what happens, but they still haven't responded to my last one.
I've been waiting for a pre-order deal to pop for Ace Combat. Thanks OP
Now I just have to hope that all of these pre-order copies are updated to the limited edition like in Europe.