An overview of evolutionary theory would be Talk.Origin's "Introduction to Evolutionary Biology" at
No webpage found at provided URL: http://www.talkorigins.org/faqs/faq-intro-to-biology.html.
The Talk.Origin Archive site has a multitude of articles, mostly examining creationist claims and explaining what's wrong with them, but also informative articles on aspects of evolution and of age-of-the-earth (a 6,000-to-10,000-year-old earth being an essential part of young-earth creationism, the kind that had most commonly been promoted before they went stealth by using "intelligent design"). And, yes, they also examine and discuss "intelligent design". Their newsgroup, talk.origins, is very active (but don't go bursting in there; comparitively speaking we've been coddling you immensely) and the Archive posts the newsgroup's Post of the Month. And they publish the feedback emails that they receive along with their responses.
All in all, a very informative and valuable source of information.
PS
BTW, many of the contributors to talk.origins are Christians and believers in a divine Creator. Creationism tries to paint all "evolutionists" as atheists, but that is clearly a false claim.
In case you haven't been told this yet, it is not at all a case of evolution vs God, nor even of evolution vs religion. Science does not say anything about the supernatural except that science cannot deal with the supernatural and therefore cannot include supernaturalistic explanations as a part of science. Science is not denying the possibility that the supernatural could exist, but rather denying that the supernatural can be used in science.
This is called "methodological materialism", which is quite different from "philosophical materialism" which would claim that the supernatural does not exist. Please note that "intelligent design" falsely claims that science is based on philosophical materialism.
Edited by dwise1, : No reason given.