I am very disappointed to read this as I thought Pierce Brosnan was just the perfect Bond, but it's also thought that this may perhaps be a negotiating ploy. I'd love to see him do one or two more Bond films.
I'm not sure if this link will post for everyone as it comes from my Earthlink homepage, but I'll also post the paragraph indicating some of the possible choices for actors to follow, some names that haven't been mentioned yet in this thread.
Report: No More Bond For Brosnan
"England-based Eon Productions, which produces the Bond flicks, must find another star to carry 007's Walther PPK in the 21st Bond movie, scheduled for release next year.
Speculation surrounds Brits Clive Owen, Ioan Gruffudd, Colin Firth, Hugh Grant, Gerard Butler, Jude Law and Ewan McGregor, as well as Aussies Hugh Jackman, Heath Ledger and Eric Bana. "
I really, really hope they don't pick Hugh Grant. I think he'd be all wrong for the role. I'd never seen Clive Owen in anything before, but I just saw King Arthur recently and he could be a very good choice. I could envision Hugh Jackman in the role also.