If you're still wondering what this is all about, California has put violent videogames on the same level as porn and banned their sale to minors. The case will decide whether it is unconstitutional. OC Weekly offers this article on how the result will affect you.
Now that the case is in session, it's getting some attention from more mainstream press like Bloomberg, Forbes, The Wall Street Journal and The Washington Post. Due to the restrictions on speech, the Comic Book Legal Defense Fund and First Amendment Center are keeping an eye on things as well.
Of course, the gaming press has been aware for a while. Joystick offers this summary of the 72-page transcript of the oral arguments and Game Politics is tracking the eleven attorneys-general who penned and signed California's amicus brief. Meanwhile, Kotaku offers these reactions from both sides:
The Electronic Consumers Association is keeping a list of more articles. It's likely too late to matter, but you may also sign the petition that was submitted along with their amicus brief.