Thanks for clarifying.
Chances are it was one of the Palestinian groups, passing out stuff along the lines of "9/11 was a Bush/Sharon plot" and "4000 Jews who worked at the WTC got calls from the Mossad on 9/10" - the standard propaganda spoon-fed to the Middle East by al Jazeera and the Muslim "clerics." If you recall the primaries, every now and then at Howard Dean rallies the cameramen would goof up and show crowd shots, and you could see that the Palestinian and other Arab flags way outnumbered the American ones in the audience.
The Dims are inextricably connected to the radical Muslim groups any more, and every now and then they slip up and let this show. It just demonstrates even more of their stupidity that Conyers put on this little sham hearing, hoping for wide dissemination in the MSM, and they've got the nutbags working the crowd with the "Death to Israel!" crap. Even now they still haven't figured out how to deal with the New Media. I shudder to think how much of this has happened in the past, to be "conveniently" ignored by the MSM.
As far as seeing the literature on the net or in print, I wouldn't count on it. Dana Milbank genuinely despises the Bush Administration and the GOP, so he's only going to report the bare minimum of this that he can get away with. He won't want to hurt the Dims too badly by publicly airing the dirty laundry - just letting us know the laundry is there will be enough in his view. And if some member of a conservative or pro-Israel group had gotten hold of some of the literature in question, it would have already been published, especially if it were really damning.