Bunch of political BS happened over the past few hours.
Ferrari, Red Bull, and Renault had lodged protests against the legality of the diffusers on the cars from Brawn, Williams, and Toyota. BMW tried to, but somehow theirs was thrown out do to a technicality. Something about not being turned in on time, or not having a proper signature. Some little thing.
This protest occurred just after the cars underwent scrutineering. All 3 constructor's cars were found to be legal by the stewards of the race. After which, the 4 teams that had issue with this attempted to have the cars deemed illegal.
This comes after a previous statements by the Race Director for the FIA, Charlie Whiting, that the diffuser designs were in fact legal. He inspected the cars in Barcelona in the last test. And made his decision from that.
Subsequently the protest have been thrown out. The cars of Brawn, Williams, and Toyota are legal and ready to be raced.
Charlie Whiting Says Diffuser Designs OK
Great Techical Article on This Subject