It's simplistic in its design but works exactly as advertised. Once you've shot or exported your video from iMovie, simply launch 720tube, login to your YouTube account (credentials can be saved) and select the video from the iPhone camera roll. Then add a title, description, tags, and category, and off she goes into the unbridled ether. You can even make the video private if you're not quite ready to come out as a true Justin Beleiber. Seriously though, the 720tube app is dead simple and has been rock solid during our testing, even over 3G connections -- it's exactly what we've been waiting for.