The Congressional Research Service (CRS) recently released an update (dated January 6, 2010, as there is often a delay between the update and release) of its "Comprehensive Nuclear-Test-Ban Treaty: Background and Current Developments" report. Have a look here.
“It will take all of us working together – government officials, and diplomats, academic experts, and scientists, activists, and organizers – to come up with new and innovative approaches to strengthen transparency and predictability, reduce risk, and forge the next generation of arms control agreements.”