Hardly tumbling down. This will be appealed all the way to the US Supreme Court, the final ruling perhaps 2 years away or more. And since the current Conservative balance of the Court is unlikely to change before then (a bolt of lightning too much to hope for), DOMA will be upheld.
Plus there is no time nor political strength to revoke DOMA in Congress before the 2010 November elections, when a likely Republican victory will prevent any consideration for another 2 years. If anything, we might expect a strengthening of DOMA, much to the joy of those like southbeach here.
So tumbling down? Not even close, just a little chip in a law that will take years yet to repeal, if ever. My greater fear is that by forcing this issue to go before a Conservative Court that will affirm it, a precedent will be established that future Courts will, by tradition, feel obliged to uphold. The timing here is all wrong, but tell that to stupid queens & dykes, whose view of things never goes beyond ME, ME, ME!
I note that Speaker Pelosi has issued a statement in support of this court ruling, but that the Obama Justice Department is expected to appeal it, for political reasons as the Congressional elections approach. The majority of Americans still hate gays, it's getting worse with the Teabagger movement, and the White House can read the polls.