Wiggins should just focus on the Olympics. He has a much better shot to do damage there and it seems like it will get him more press in Great Britain than anything other than a TDF victory, which is highly unlikely for him.
The Giro and Tour route announcements are coming soon, so we should get an idea of how hard the Tour is going to be. I wonder if they'll make it a little easier hoping that guys will ride the whole thing. They've already moved it ahead 1 week on the calendar.