Personally I like George Clooney, but as was said before, when he's up on screen, that's who you see. Not so much the character he is supposed to be playing.
Wyle did great in Pirates, but it was a TV movie and he's a TV actor. I suspect he wants the role because he hasn't done much lately and because it's on the big screen, he'll think he can make the jump. Besides, he's been Steve before. I'd like to see another actor offer another take on Steve.
Bale's name has been tossed around here too. Bale was superb in The Fighter. Bring that intensity and loss of self into the Steve Jobs role and you might have a winner.
I had to laugh when somebody said Tom Cruise. The guy's a loser, period. Stick a fork in him, he's done.
Day-Lewis could've pulled it off 10 years ago, but he's old now, as is Clooney.
To those that show pictures side-by-side of the actor and the subject, you do know that an actor doesn't get a part on looks alone, although I think Giamatti would great as Woz.