PZ Myers was there with him and made a post about it.
He wrote: "It was genuinely bizarre. As you can see in the clip made as we were standing outside, there was no shouting, no disruption, no rudeness at all going on — they simply plucked Derek out of the group and told him he was a bad boy.
I think Derek was simply their chosen sacrificial lamb, used as an excuse to vent their failed expectations for a ferocious confrontation."
ABC has picked up the story as well as many other blogs.
Please DIGG - http://digg.com/d3105ht
Video from just after getting kicked out.