Go back to the threads about how to fix InterNEXT from jan 2010/2009. There were loads of brilliant ideas.
In short it boiled down to mainstream people. I would vote for Seth Godin or Merlin Mann, other people suggested similar peeps.
The other thing I would look at is the way unconferences work, with participants themselves whiteboarding what they want to hear about when then arrive.
I wrote a blog post explaining more here:
http://www.adultmarketing.co.uk/2010...-the-solution/