Getting near the end, so let's just dig in.
George Clooney - Michael Clayton
Daniel Day-Lewis - There Will Be Blood
Johnny Depp - Sweeney Todd: The Demon Barber of Fleet Street
Tommy Lee Jones - In The Valley of Elah
Viggo Mortensen - Eastern Promises
This might be the easiest category to call the whole night. In any other year Clooney would probably win, but Day-Lewis walks away with this one. It's impossible to imagine There Will Be Blood being anywhere near as good with anyone else, and equally tough to imagine any other actor who could have pulled off the part. Day-Lewis is onscreen for almost the entire film, and he holds the audience's attention from beginning to end.
Should Win: Day-Lewis
Will Win: Day-Lewis
Cate Blanchett - Elizabeth: The Golden Age
Julie Christie - Away From Her
Marion Cotillard - La Vie en Rose
Laura Linney - The Savages
Ellen Page - Juno
Blanchett already won for playing the character, so it'd be gaudy to give her a second statue. Linney racks up yet another nomination without a win. (Call me Laura!) Cotillard won the Golden Globe, but that was the foreign press - she doesn't stand a chance here. Which brings us to Christie and Page. Christie gets to play ill, which is usually an Oscar-shoe-in for a man, though not so much for a woman. Page is great, but young - voters might regard her as having many more chances for a win later in her career.
Should Win: Page
Will Win: Christine