Go to the Flash Portal, and you'll see the most recently submitted flashes in the left column. The ones in gray are under judgement, and are the ones you're looking for.
These flashes must pass certain score checkpoints to survive, with the final checkpoint being a minimum score of 1.60 at 200 votes.
Watch the under judgement flash and vote. If you vote 0 or 1 and it goes on to be blammed, you get a blam point. Vote 2-5, and it passes, and you get a protect point. Simple enough.
Also, ONLY under judgement flashes can be blammed; doesn't matter how low the score gets after passing. Once it's passed, it's there for good unless the author or an admin removes it.