Definitely seems sketchy to me. Particularly this line on the application form:

    Have you ever successfully released an app 
    on the Apple Market? *

The application form itself is an embedded Google Docs form with this unfortunate footer:

    This content is neither created nor endorsed by Google.

I'm pretty sure it's a hoax ... check there's no information about the event organizers. All forms etc. are from free google products (forms, drive maps) and at the stage right now it's highly unlikely in my opinion that google would host an iOS hackathon ;)