Here are some links to web sites related to evolution:
AIBS links to Issues in Evolution
Evolution, by Douglas Futuyma The companion website
for your textbook
Evolution, by Mark Ridley This site has many, helpful resources.
The Evolution Research Center for Students and Teachers of Biology
The Panda's Thumb - a web site to discuss popular misconceptions as well as creationist attacks on science
Thoughtful responses to all creationist claims
The Writings of Charles Darwin on the Web
Charles Darwin - American Museum of Natural History
Galapagos Mockingbirds - Patterns of mockingbird distribution inspired Darwin even before he recognized the importance of finches on these islands.
Darwin's Finches - Studies by the Grants
A Ring-Species, Ensatina eschschultzi
Using Game Theory to study Evolutionary Adaptation
Continental drift simulations (Berkeley)