Bookmakers have Eric Bana as the frontrunner to be the next James Bond, closely trailed by Clive Owen, Hugh Jackman, Colin Farrell, Orlando Bloom, and Jude Law.
http://www.itv.com/news/1956885.html
I think the Brosnan years have been really good for the Bond franchise, probably the best era after Connery's reign. None of these guys seem to me that they would be able to deliver a one-liner with the standard Bond dryness. Bana has a sense of vulnerability about him, an emotional openness that just doesn't fit the character. Personally, I would love to see Rupert Everett as Bond. Not an action hero, but could carry off the Bond charm better than anyone else.