Two Resources for Christianity/Islam Distinctions
1. Children of Abraham Ministries- I know Dr. Bassam Chedid personally. He's an visiting professor at Reformed Theological Seminary and an adjunct professor at Belhaven College, where he teaches courses on Islam.
2. I've also been told Father Zakaria is an excellent resource regarding differences between Christianity and Islam and that this site is having a significant impact among Muslims. Articles in English, Italian, French and Arabic. While I've just skimmed it's surface, a quick glimpse shows a wealth of material and from my first read looks like good stuff.
I present these for those struggling over these issues as well as those defending the faith in these areas.