According to an October 29, article by Debbie Schlussel, Ali Abunimah is Likely Source of Secreted Obama/Khalidi/Ayers Tape.
Schlussel writes, "The Los Angeles Times has a copy of the tape, but won't release it because they said the source--whom I believe is Arab American Action Network (AAAN) founder and anti-Israel Palestinian activist Ali Abunimah of Electronic Intifada--required it not be released as a condition of sharing it. That's because it likely shows Obama applauding an anti-Semitic, anti-Israel poem that was read at the dinner".
This reporter goes on to say, "But what you may not know is that I started the whole story, and Los Angeles Times reporter Peter Wallsten plagiarized me. (WND's resident ganif Aaron Klein also ripped-off the same article in May.)"