Twitpocalypse Now? Hardly.
You can come out of your bomb shelter now -- the Twitpocalypse didn't happen! Mostly.
What am I talking about? My colleague Sean Michael Kerner maps out the glitch-that-mostly-wasn't that had been widely feared (well, "widely" among the kinds of folks who live and die by the microblogging phenom,) but for the layman, think Y2K for Twitter.
(You can also get the gist of the technical discussion here.)