...and a prime example of why democracy is seriously overrated. It's a means, not an end, people.
My understanding (which is admittedly limited) is that the CA Supreme Court could really only rule on whether Prop 8 was a constitutional change to CA's constitution or not. And I'm pretty sure that it is.
So to recap: if you're gay in California and pissed off (or even if you're neither but still pissed off) you should blame the people of California, not the courts. And you should give serious consideration to moving your talent and tax revenue to Iowa.
And if you're in California and happy your fine state is keeping the queers down a little longer, you should keep in mind that California has a clearly established legal precedent that your rights under the law can be abridged by a mere majority vote of the people. Have fun with that.