The full niconico English version was released on oct. 17 and can be accessed if your browser is set to any language other than Japanese by going to nicovideo.jp. niconico.com is no longer active. This needs to be updated
I looked at your update and it isn't clear that the English version can be accessed via nicovideo.jp. Could you update that?
Also, their name changed from ニコニコ動画 to just niconico back in June of last year as they're trying to get away from just being a video site. Concurrently, the English name of the service is Niconico. They also spell it that way on their Facebook page: http://www.facebook.com/niconicocom
Does anyone know if the Nico Q can be used in the Japanese version of the site? I love the new auto playlists. Unfortunately, the English version's tags seem to be a separate system from the Japanese site, so I have to keep switching languages to find covers. On http://www.nicovideo.jp/q the Japanese language version tells me I can't switch for some reason.