For really interesting insights to the entire Russian Spy Ring, there is the interview between a former CIA Case Officer and a former Major General in the KGB, here:
http://www.spymuseum.org/programs/spycast.php
It’s the July 12th entry. In it they discuss the nature of the spy ring and what it means. Most interesting is the difference between what they think is bad technique and what the press honed in on.
As an aside, for anyone actually interested in real world espionage, the Spycasts are some of the most interesting podcasts on the web.