Bibi had a very powerful speech. I was at the GA with some students from Concordia-- where in 2002, Bibi's visit was cancelled because of anti-Israel hostility (read: riots).
Check out my coverage of the speech:
http://oybay.wordpress.com/2006/11/16/bibi-to-ga-iran-against-israel-as-first-step-in-world-domination/

Bibi is an amazing speaker. And what is freaky is that his predictions are almost always right