This is it: Robert Spencer’s speech to the Young America’s Foundation conference in Washington on August 2, 2007. This is the speech that the Council on American-Islamic Relations (CAIR) tried to threaten YAF with legal action into stopping.
Apparently, CAIR doesn't believe in free speech when it comes to revealing anything critical of them or Islam.
The video begins a few seconds into YAF spokesman Jason Mattera’s introduction. Enjoy!