[gumpzilla]

Dawkins wrote a book focusing on exactly this line of thinking. It's called "Climbing Mount Improbable" and is a quite interesting read. I don't remember all of it, but the chapter on the eye makes what I thought was a pretty compelling case (when I read it a few years ago) for how gradual development of the modern eye could have taken place.

EDIT: He also discusses wings, which seem sort of like another "all or nothing" type development you wouldn't expect from evolution, and how they could have occurred. The final chapter was a very weird symbiotic relationship between figs and fig wasps that I wish I remembered better.