discussioboards/wikis/blogs - a way of thinking/designing tools that educational tech providers could help us with?

There has been recent developments by learning technology companies to intergrate wikis and blogs within VLEs. There is an interesting argument that placing them within this environment strips them of their fundamental social essence. I don't want to argue this here, but want to think about how to intergrate them far deeper and how they support and link to assessment.
this video gives more detail.
http://screenr.com/NgC

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