Thought it was a good piece, though I tend to think that if one is going to treat such topics, better to go long than short. 

For anyone interested in a fair and dispassionate discussion of the subject, which expands on the current article, try Oxford Islamic Studies Online: 

http://www.oxfordislamicstudies.com/article/opr/t236/e0567

This is should put to rest some of the more specious claims being made here. Kind of silly to judge Islam through the lens of Christianity, as a Christian heresy. Self-defeating.