Well, after rumours that Pirelli might sue and Mercedes might leave the Tribunal of Doom ended up giving them a slap on the wrist. Mercedes do miss the Young Driver Test, but given they themselves suggested that as a penalty it’s hardly being burnt at the stake.
Some say Red Bull may be considering an overt rebellion by openly testing in-season and defying the ban on so doing: http://www.espn.co.uk/fia/motorsport/story/112205.html
However, there’s a world of difference from an ‘in good faith’/accidental breaking of the rules and wilfully flouting them. The FIA would come down on Red Bull like a ton of bricks and I think this is very unlikely to happen.
Pirelli are taking the hard and medium compounds to Silverstone, which has drawn some criticism from Lotus, who legitimately argue that there’s no point making tyres softer if you then take harder compounds to each race. Tyres for Silverstone and a race or two later can be found here: http://www.formula1.com/news/headlines/2013/6/14675.html
Speaking of Lotus, they’re taking a hefty upgrade to Britain and are hopefully of once again fighting at the sharp end. Although Raikkonen’s poor showing at Monaco can be attributed to the difficulty of overtaking and well-known qualifying issues, his poor performance in Canada may be more worrying for the team.
Given it’s 3 weeks between races I imagine just about every team will have an upgrade of one size or another. We’ll have to see how they, and the weather, work out.