Just finished watching The Sum of All Fears on FX. Not a bad movie. Not a great one, but not a bad one. The book was better, but that almost goes without saying. The book is almost always better than the movie.
Here's what I really noticed though... Ben Afflick is a lousy Jack Ryan. For that matter, Harrison Ford wasn't the greatest Jack Ryan in the history of the world. To be honest, they only made one really good movie from a Tom Clancy novel: The Hunt for Red October. God help me, but Alec Baldwin was the only Jack Ryan who was true to the character.
Oh, and while we're at it? Willem Dafoe made a piss-poor John Clark.