Here’s a link from the New York Review of Books on current books trying to frame the current debates in the Muslim (mostly Arab) world. I give credit to the author for attempting to make sense of such a broad topic. For such a short piece, I think he does a good job. However, the piece is too short for a real understanding of the issue for non-specialists. Still, a read worth noting.
Update: Found another good summary of some of the issues involved in Islamism.