I was cruising around SlideShare today – just looking for some engaging resources – and I came across this contribution from Robert and Maryam Scoble !
OK – so it’s not brand new (10 months old) but it makes some good points and with a couple of hundred students all starting up their edublogs, I think this slide show can add another voice to the "Why?" & "How?" & "What for’s?"!
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Digital Dialogues 
Hi Anne,
This is a great slideshare. I have just done a 31 day blogging challenge – http://www.flairandsquare.com/howto/31-day-challenge/ and some of these points add to the learning our network got from this challenge.
I have added this one to my Slideshare favourites.
Thanks,
Alex