Things change.
The California Independent System Operator, the folks in charge of
the electric transimission grid in california, announced today they've
established a new notification service. In case the ISO implements
rotating outages or electrical emergencies, they will send e-mail
to newsrooms.
From the media release, it appears this is only for members of the
media.
For the public, the ISO will add outage information during rotating
blackouts to their System Status web page http://www.caiso.com/
Local power companies also have evolving notification policies. As
the number of rotating blackouts increase this summer, I expect all
of them will provide notification. The Internet will be one of the
primary methods for transmitting notifications to the media, which
will in turn inform the public.
Sfgate.com has been providing notice for a couple weeks, at least. I got
the notice about the iso issuing a stage 2 alert earlier today.
http://www.sfgate.com/newsletters/energy/
CA ISO has been providing notice for quite a while (as long as I've been
checking their page since last June) at
http://www.caiso.com/awe/systemstatus.html
It lists the current alerts, etc..
Also of interest may be:
http://www.caiso.com/SystemStatus.html
-j
Sorry, I should have clarified. That's what I get for rushing a post somewhere
just before leaving work. 
sfgate.com is providing email notification. I'm pretty sure it's just the
notices the ISO sends to news agencies resent, but I have no proof other
than loosely connecting a few facts together. Anyway, the URL I provided
is where you can sign up for email notification.
Sean Donelan (sean@donelan.com) said, on [010424 21:06]:
The California Independent System Operator, the folks in charge of
the electric transimission grid in california, announced today they've
established a new notification service. In case the ISO implements
rotating outages or electrical emergencies, they will send e-mail
to newsrooms.
>From the media release, it appears this is only for members of the
media.
Not to resurrect a week old thread or anything, but:
http://www.incident.com/edismail.html
-Pete