Check out geneticist Steve Jones‘ summary and update of Darwin’s On the Origin of Species in this week’s issue of New Scientist.
As an editorial explains:

In the heart of this issue is a 21st-century version of the founding text of evolutionary thought. Use it to peer inside the brilliant mind of Darwin and to read modern examples of the evidence that demonstrates the argument put forward in The Origin is no longer just a theory (in the colloquial sense). The veracity of Darwin’s thinking shines out with clarity. The long argument is over and, as Darwin himself aptly put it: “There is grandeur in this view of life.”