I live in LA now - It was the lead story for a couple of days on the local news and still is one of the lead stories. LA likes to "claim" San Diego sometimes when big things happen like this. Of course, I'm more keyed into it because I'm from the area, but even people I've talked to up here know about the case.
Orange county and Ventura get the same news that LA does. I'm not sure about Riverside or San Bernardino Counties but I would assume they would also get the LA news. Even Santa Barbara gets some LA news stations.
The story has been surprisingly national. I've seen it on all 3 nightly news programs, CNN, HNL, etc etc. Obviously you have to be paying attention to hear about it, but still...