Via an AP text-alert:

Appeals court: California's voter-approved ban on same-sex marriage is unconstitutional.

The invaluable Prop 8 Trial Tracker says that the decision upholds 80 findings of gay marriage fact by District Court Judge Vaughn Walker—who originally struck down Prop 8 back in August of 2010—and also affirms that there was no reason to throw out Judge Walker's 2010 decision because he's a gay man.

Still unclear, at least to me: What the 9th Circuit says about whether gay marriages can resume immediately in California, and what route supporters of Prop 8 will go for an appeal.

The New York Times, however, says it's all-but assured that "the case will proceed to the United States Supreme Court."

And.. The National Center for Lesbian rights explains the appeal process timeline:

The supporters of Prop 8 have 15 days to ask the Ninth Circuit panel to reconsider its decision or to ask for reconsideration by a larger panel of judges on that court. Alternatively, they have 90 days to request that the Supreme Court of the United States review the case.

More on the decision—and a big question it raises in Washington State—right here.