Wafa Sultan is a secular psychologist of Syrian-American origin. Go read more about her on Wikipedia to get the background. Although she is quite well-known for her part in the the public discussion on the clash of civilizations her recent appearance on Al Jazeera has spread on the Internet like wildfire.
Have a look for yourself: Wafa Sultan on Al Jazeera (MPEG-4 H.264, 5:28 min, 30.4 MB)
The recording was provided by Memri TV (The Middle Easte Media Research Institute TV Monitor Project). Too bad the recordings are only available in WMV, but Memri TV provides an interesting view on the Arab world. There is a special section on Al Qaeda as well.