In 2007, the Skeptic Society had an entire weekend conference devoted to this topic.
After two full days of watching various scientists for hours and hours show essentially the same set of slides, I left not knowing a damned thing more than I knew when I got there (and I am by no means well-versed on the subject), and bored out of my frickin' skull. I was not alone in this. Not even close.
2 points here.
First, sounds like it was badly set up, with insufficient attention to the audience's level of expertise and lack of focus on the questions they really needed to have answered.
Second, it's actually enlightening. So here we are, skeptics who so often rail against others who "deny" science and logic... lost in the minutiae of a scientific question and none the better off for hearing the evidence.
I still say I would like to see some time devoted to this. But as your experience demonstrates, the talk(s) would need to be properly focused. (And btw, PZ's talk at certain points had the same effect on me -- I found myself thinking, "Can you skip the more arcane minutiae that's going over my head, give me the gloss, and get to what it means?")
The kinds of questions I'd like to see addressed include:
Which issues have a broad consensus, and which do not?
Broadly speaking, in layman's terms, what sort of investigations were done, and what have they shown?
What are the current "hot" topics that we most need answers to at this point?
Of course, I'd also like to see an even wider lens cast on the general topic of the difference between environmental science and environmental activism, and where the contentions of the latter have outstripped the actual knowledge we have based upon the former -- but it'd be a hard thing to gather a panel to tackle that.