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.
"Though we have acheived progress, our work is not over. That is why I support the mission of the Arms Control Association. It is, quite simply, the most effective and important organization working in the field today."