A Kingdom Hearts 3D [Dream Drop Distance] demo is now available to download from the Nintendo 3DS eShop on North American consoles. The demo is, of course, free and will allow you to play it 30 times in total. It is the same demo that appeared on the Japanese eShop, in English-- so, the demo contains the tutorial, boss fight against Ursula, and the start of Traverse Town, playing as Sora. We'll have videos for you soon.
Update 1: The demo is also now available on the Nintendo eShop in both Europe and Australia. This version of the demo only allows for 15 uses, rather than the 30 uses which are possible in the North American version. Apart from this small difference, everything is the same.
Update 2: We have uploaded the demo announcement video from Nintendo Direct, in HD 720p. You can watch this below, or view and download it from our video archive.