Are you on Twitter? Follow @StopProp23 & watch their doc
I found this Twitter account from http://www.stopdirtyenergyprop.com/
As in their name, they're posting constant updates on Prop 23.
Follow them now to keep up to date on the campaign.
They've also got an interesting documentary: 14 minutes long, so it's not overwhelming, but has a wealth to support a "No on 23" campaign.
Check out the doc here: