Jamie Kilstein is a cohost of the podcast Citizen Radio. His vigorous, wide-ranging, hilarious, and righteous rant was one of the real highlights of the Reason Rally. He actually was the one speaker I noticed to devote any significant part of his speech to scathingly criticizing the atheist community for any of its deficiencies. I was impressed by how versed in atheist internet controversies he was (most specifically he addressed an infamous Reddit incident).
His rant (below) is filled with NSFW language:
I love the takedown of agnostics:
Welcome to a rally with no agnostics. I think I like Christians more than agnostics because at least they took a really dumb stand. Agnostics are like people who vote independent–pick a side and start losing friends like the rest of us!
He came back to fill time while Bad Religion set up: