Thanks for the info. Good news!
As MooneyFlyer stated, I think a lot of recorders are doing the 2 hours already. I just dug a manual out, and my recorder does two for the ambient channels, and 30 minutes for the headset and radio channels. So unless the crew intentionally erased the CVR (which would open a whole other discussion), perhaps we'll find out what happened. Or not - Northwest has an older Airbus fleet. Whatever the case - it'll be interesting to see how this plays out.
Interesting week in aviation, that's for sure. At least nobody was hurt.