Probe Ministries had an excellent series of short commentaries on how Christians should view and interact with Mormons and Mormonism. It was very forward thinking. You can read Understanding Our Mormon Neighbors, or go there and listen to the mp3 podcast.
This modified Nicene Creed not only reflects the differences between Christianity and Mormonism, it is humorous to see it presented as a modified Nicene Creed. My favorite?
And He and Joseph Smith (12) shall come again with glory to judge the quick and the dead, Whose kingdom shall have no end.
Few modern religious Christian scholars approach the clarity and depth of writing as Richard John Neuhaus, Canadian Catholic priest and writer. One of his recent articles in the always excellent First Things has a salient couple of paragraphs on the difference between Mormonism and Christianity. (HT: Evangelical Outpost)
I am not much into debating Mormonism, but Dr. Al Mohler (Southern Baptist) and Orson Scott Card (Mormon, and author of my favorite sci-fi book Ender’s Game) have begun a debate on Mormonism and Christianity at beliefnet. Though both are being very nice to one another, if you read the comments, you can see that clarity is lacking due to some typical issues with such debates, i.e. definition of terms, a lack of agreement on a common authority (e.g. the bible), and infighting on who gets to own the term “Christian.” However, I do like Mohler’s approach in discussing the obvious – that Mormonism differs in significant ways from traditional, historic, orthodox Christianity, so that regardless of who gets to claim the label “Christian,” they are NOT the same faith.