Yes, iMessage Is Down
October 30, 2012
You're not alone. Apple's iMessage system is currently down. We haven't heard yet what is causing this outage. In the meantime, please continue checking Apple's iCloud Web page that addresses these sorts of events.
UPDATE: Our iCloud and iMessage services started coming back up around 6:07 p.m. EDT. If you're still having issues though, let us know!