This is fair warning for all non-US Google Now users: The latest Google Search update for Android has apparently shut down Google Now cards and all that for a shockingly large number of people in a wide range of countries.
If you use Google Now do not update Google Search! Better safe than sorry if you're using Google Now.
I'm not really sure if this is a temporary issue, a bug in Search or what. Currently there are no ways to fix the issue beyond "don't update Search".
If you've already updated and aren't in the U.S. is Google Now still working for you? Or has it stopped working?