Producer Michael G. Wilson said the title, chosen only a few days ago, was taken from a story by Bond creator Ian Fleming that appears in the collection "For Your Eyes Only."
Craig said Fleming defined a quantum of solace — it means, roughly, a measure of comfort — as "that spark of niceness in a relationship that if you don't have, you might as well give up."
Filming began earlier this month at Pinewood, the franchise's home since the 1960s. It's a direct sequel to 2006's "Casino Royale," beginning an hour after that film ends, with Bond devastated by his betrayal by true love Vesper Lynd.
"He had his heart broken at the end of the last movie and that certainly is a spur for him in this one," Craig said.
"I'd be lying if I said there wasn't revenge in his heart. But it's more than that. That spurs him on, but that's not what the movie is. It's not a revenge movie. It's about him figuring a few things out."
Producer Barbara Broccoli said the film, directed by Marc Forster ("Monster's Ball," "The Kite Runner"), mixes Bond's "inner turmoil" with action — and of course gadgets — as he tries to stop a shadowy cabal trying to bring down the world economy.
Craig's second Bond adventure continues in the gritty vein of "Casino Royale," in which a rough-edged 007, newly granted his "license to kill," bled, sweat and felt real emotion. But Wilson promised it also has "twice as much action" as its predecessor.
"It's pretty jam-packed," he said.
Filming began at Pinewood three weeks ago. Location shooting will take place in Italy, Austria, Panama, Chile and Peru.
Mathieu Amalric is a new addition as villain Dominic Greene. But the French actor, star of the Oscar-nominated "The Diving Bell and the Butterfly," won't be sporting a trademark tic like many of his predecessors.
He and Forster decided his villainy should come from within.
"That's maybe what is horrible about today," Amalric said. "We can't guess who the villains are. The villains are invisible."
Amalric said he modeled his character to some extent on former Prime Minister Tony Blair and French President Nicolas Sarkozy.
"I've been taking details, the smile of Tony Blair, the craziness of Sarkozy, he's the worst villain we've ever had," he said.
Bond may find solace — producers are coy — in the arms of two Bond Girls — Ukrainian Olga Kurylenko as a feisty Bolivian named Camille and Gemma Arterton as an MI6 agent named Fields.
"In the movie, he is obviously still attached to his past," said Kurylenko. "The appearance of this new girl might divert him. Or, it might not."
Craig, who overcame public skepticism — a blond Bond? — to win rave reviews for "Casino Royale," said he still felt nervous about the role.
"All the fear I felt before is still there," he said.
"This is a $200 million movie, and it's James Bond. We have to make it great."
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