This article from the Observer suggests that we have reached the end of our evolutionary path.

"A generation ago, men and women rarely mated with anyone from a different town or city. Hence, the blending of our genes which will soon produce a uniformly brown-skinned population. Apart from that, there will be little change in the species."

And "survival of the fittest" no longer matters:

"virtually everybody's genes are making it to the next generation, not only those who are best adapted to their environments."

Of course the entire debate ignores the possibility that gradual evolution is an illusion, which is the most obvious reason for it not happening within the modern era.