Running the nightly with wingray gapps. It runs pretty good .
There were crashing issues with Google Now a while ago as well for CM10. What I'd so special about that app that it crashes way more easily than other apps?
From what I can tell is that Google Now was having issues with the Hotword detection. The gapps package does not have the Hotword by default installed, it is however flashable from the thread the gapps are from, just not tested yet.