I found this on Craigslist - 
Saddleback Church on Sunday morning.  I did some searching and Rick Warren, the founder of Saddleback, (which is the 4th biggest church in America) 
told his congregants to vote yes on 8.  I also saw this rally posted on a number of sites.  Everyone who diggs, 
give it a digg!
There is also a 
Huntington Beach Saturday afternoon event on Facebook, though there are only 2 confirmed guests.
I work Saturday, but Sunday morning at a church in OC?  That may be irrisistible.