NicoNicoChannels
Recently NicoNicoDouga launched a service called "NicoNicoChannel".
Here you can see all the "official channels" categorized under "politics" - which even the prime minister of Japan has his channel and the opposition parties such as Ichiro Ozawa of DPJ and Kazuo Shii of the Socialist party has their channels. "public organizations, companies and brands" has a police channel where they have education videos of crimes and Toshiba channel and Comesta channel. They have "education" channels, "TV/Media/weather" channels, "music" channels, "movie" channels, "game" "anime" "comedy and sports""artists and celebrities" etc.
Until NicoNicoChannel launched, all of the videos were free to watch in NicoNicoDouga, but some of the NicoNicoChannel charges you some fee to watch their video. Other channels are free.
For example, if you try to watch an anime called "Candy Boy", they require you to "join" the channel and pay 315yen(around 3$)/month or 945yen for 90days usage.
Within "variety" category, there was this channel called "NicoNicoMesse". NicoNicoMesse is an instant messenger based on MSN messenger which you can chat with your friends while watching NicoNicoDouga videos.
It looks like Microsoft made this promotion video of NicoNicoMesse using MikuMikuDance :)
