Mytoons which is in private beta is a new Youtube type of video sharing service specialised in animations.
It has the usual social media functions, such as most viewed, top rated, most discussed and most recent etc, and I am sure Tagging will come soon.
Perspective: Whether the market can sustain a dedicated Toon network as opposed to part of the Youtube network. However, if they manage to create conversations and discussions amongst the animation community then I believe there is a place for a niche category like animations.