My predictions: This wll be one of the fastest turnarounds of a book to movie in Hollywood history. Noted screenwriter and coke-head Aaron Sorkin (The Left Wing) will write the screenplay (Woodward and Bernstein will be brought in as "Washington Consultants"). Rob Reiner (who else?) will direct. A heavily made-up Russell Crowe, in a virtual reprise of his role in "The Insider", will play Richard Clarke. Halle Berry will probably play Condi Rice (although this could result in some serious "artistic license", as it will doubtless involve adding a romantic subplot between "bad-boy" Crowe/Clarke and Ms. Berry/Ms Rice).
Danny Glover will play Colin Powell. Robin Williams will play President Bush. Bill Clinton, in a special guest role, will play a grieving 9/11 family member. Release tentatively set for October 28, 2004.
Robin Williams wins Best Actor as Richard Clarke.
I think Denzel would play Powell.