For those of our readers who may have a hard time distinguishing between the various breeds of Muslim, Joe Carter at Evangelical Outpost provides us with a good summary of the main differences between Sunni and Shia.
In our opinion, the differences seem minor compared to what they share in common, i.e. a desire to convert the world by killing all infidels, if need be. Nevertheless, the distinctions between Sunni and Shia must be significant in their own eyes because when they aren't killing infidels they sure delight in killing each other.