Brandon on Arguments from Evil and from Design.

...The two types of arguments make use of the same basic processes of reasoning and similar views of design as relatively obvious to spot if it's there; they just reach different conclusions because one says that this or that is obviously good enough that it has to be designed, and the other says that that or this is obviously bad enough that it couldn't possibly be designed. And both tend to be locked into the view that it is design or nothing.