I have just spent two days doing Enterprise 2.0 for a large organisation.
Well ... no I didn't .... what I did was spend a very agreeable, if tiring, couple of days with people from said large, global, corporation. We sat in one of their homes with nice food, good conversation, a wifi network and our laptops and mobile phones. It was a very congruent way to engage people in the possibilities of the web - showing, playing, discussing, explaining.
It appears to have worked.
If anyone else fancies doing the same sort of thing with people from their organisation you know where to find me.