Lee Dryburgh has been organising a great telecom conference called Ecomm for the last two years. It specifically excludes people pitching their products and only gives sponsors a speaking slot if they have something to say. http://ecomm.ec/
I was lucky enough to speak on the Amsterdam version. I had a 7.5 minute slot to tell my story on why all telecom marketing and product management is wrong and another slot on another day on why voip won't be free anytime soon. I thought the format worked great because of the short pitches of the idea, instead of the usual BS on market shares etc.