The Vive is officially 'out now', even if it has a staggered release so only those who ordered really early (and whose pre-orders weren't suddenly cancelled) are getting it now. For others, myself included, the headsets are coming later.
Not to let that dampen their launc though, Valve and HTC have put out a launch trailer for the headset. It's actually quite effective, just showing off the headset in use. It also shows off something unexpected that I'd been hearing about the tech, which is that it's actually a pretty social experience in the right setting.
Take a look: