I would go work there just to try to find out what this vaunted decryption breakthrough is. Do we all have to stop relying on ssh to secure communications, or something?
Most likely most of their breaks consist of widespread implementation of very specific techniques on problematic protocols (say timing attacks). Even with the ability to straightforward break certain primitives, it's computationally intensive, so widespread crypto usage still hurts their dragnet ability. And they certainly can't engage in widespread active attacks, so I doubt they care very much about digest/signature algorithms. And why would they waste time snooping SSL banking sessions just to screen scrape the HTML when having the banks/FinCen setup a DB mirror is much easier?
Even if you were to find out, what good would it do? Let's say the worst case scenario was true, and all block ciphers are extremely busted, and their contents decrypted and mined along with everything else. Would you basically forfeit your life to be a patriot of humanity and publicize that fact? (Especially given how much kool-aid you had to drink to find out in the first place, and how overwhelmed you'd be by the reality of an industrial spying operation). If such a break really is the case, the private sector will figure it out over time. Meanwhile, IMHO, the only thing a freedom-preserving person can do is assume the abstract concepts of cryptography are feasible, and build systems with the primitives we currently have. Don't worry about them reading your present communication in the future, because if we're to the point where they're casually arresting people based on their ideas, we're boned anyway.
Also, to anyone who thinks "US laws protect citizens from spying", your wishful fairytale is only deceiving yourself. I'm sure NSA views the whole process akin to a quantum computation, where they massage the data on everyone using massive vector operations (which they don't consider interception on individuals, as it's a mechanical process), and then a kind of decoherence step where they read the answer. If your completely-between-citizens correspondence is interesting, it's reflected in the interest level of a cross-border relationship, and the latter is reported. They start a specific investigation (with the sham-court rubber stamp) and see the whole picture eventually. And yes, I know the NSA isn't interested in widespread de facto criminality, but if the only reason the details of your personal life aren't being scrutinized by another human being is that you are just not interesting enough, exactly how could you claim that you aren't being spied on?
If such a thing exists, they wouldn't share it internally either. It seems they are already collecting data across many protocols and encryption schemes, and very few people would get to know reliably which were cracked or how.