I urge anyone reading this to listen to this lecture if you have time (it runs over an hour with Q and A). To listen, click the following the following link and then click "play now":
http://www.chbcaudio.org/2007/04/13/...slamicization/
The speaker is a former muslim that grew up in a muslim family. The family moved to England where he converted to Chrisitanity. He talks of the nature of Islam and what challenges face Christians, the US, and the West. It is very sobering.