ETA:Oh dang it! Not only did the rash of apocalypse-themed puzzles not come, but I forgot to say what type this is! Anyway, it's a slitherlink. Draw a loop along the edges, a loop that doesn't reuse any edges or points, such that each number says how many sides of its square or triangle are used by the loop.
Hey, LiveJournal changed its posting interface. That's kinda interesting.