Do you know of anyplace there is a good compendium of "where they are now" and write-ups about the proteges of these spies? We are within one generation of these events, and the circles in which these people moved are still relevent today.
The status of some the actual spies, as opposed to their enablers in the administration, was given in the final chapters of Richard Rhodes'
The Making of the Atomic Bomb, published in 1987, IIRC.
I think there is some additional material on the Soviet atomic espionage in his followup book Dark Sun, from 1991. For this latter book he was able to travel to Russia and get access to the surviving Russian nuclear scientists and the archives of the KGB.
Other than that, I would recommend a Google search on some of the more notorious spy names.