I don't have a thread for this, but know that exit polls are showing that the anti-gay marriage initiative in California is faltering(via Andrew Sullivan.) Unfortunately, it appears that the ballot initiative in Arkansas that would ban unmarried couples (read, gay couples) from adopting or serving as foster parents has passed.
UPDATE: I spoke too soon. It looks like Proposition 8 is likely to pass, thus amending the California constitution to limit marriage to heterosexuals.
UPDATE II: See our newest post for a more comprehensive treatment of various state ballot initiatives.