Slacker and stoners revere him as the Dude. Kids love him as a video game character in Tron and a comic book villain in Iron Man. Grown ups like him too: Terry Gilliam says if he could he would work with him in every film he made, and after The Fisher King you can see why. And now, finally Jeff Bridges is up for an Academy Award. So why the nod after all this time? Was it the plucking and the singing?