Double the price of last year.
This will be the first time I won't even bother to register. Too much money.
They could say there are no giveaways, but nobody's going to listen to the boy who cried wolf anymore.
Of course adding one more day to a two day conference doesn't double your costs, but I'd image that Google is taking into account inflation as well as just trying to increase their profit margin (though taking into account the amount of hardware they give out they give out to attendees does indicate that they're also trying to limit the audience to actual developers).