Shipped to theaters under the code name "Cover Up".
It's never stated explicitly beyond "present day," but the main action in this film takes place "in the near future" after the movie's release (summer of 2010). Evidence: In a scene shortly before the vice president's funeral, a long shot of a TV newscast shows his date of death as 2011.
The movie was originally scripted with a male lead and Tom Cruise was approached to play the title character. Ultimately, he backed out and the script was rewritten with a female lead and Angelina Jolie took the role.
The name Salt is a reference to the Strategic Arms Limitiation Talks (S.A.L.T.). The talks, of which there were two, were between USA and Russia during the cold war.