Larry Moran is a Canadian biochemist and textbook author who has a blog about evolutionary biology called The Sandwalk. Recently he has been posting essay questions which he intends to use in an upcoming test of his students. Quotes from Richard Dawkins and Daniel Dennett that he wants his students to critique. Also some quotes from Richard Lewontin that he wants his readers to admire.
The interesting thing is that Dennett and Dawkins have both jumped into the discussion, as have a number of my favorite (though lesser known) biology bloggers. Interesting discussion. Worth a look if you are interested in evolutionary biology.
I suppose the epistemological point that Lewontin would harp on here is that if you go in expecting Nature to only do things that seem well-motivated and 'natural', then you are going to produce ideologically biased science.
But as to whether evolution can produce complex 'designed-looking' characteristics that are not positively adaptive, give a look to this single-topic blog by Arlin Stoltzfus and this paper discussing an idea known as Constructive Neutral Evolution (pdf).
The last features a pretty bizarre definition of "neutral":