Humans are most definitely continuing to evolve.
Consider the pre-requisites for natural selection:
1) Not all offspring which are born survive (check!)
2) There is variation amongst offspring (check!)
3) Differences between offspring lead to differential survival (check!)
4) Differences between offspring are inheritable (check!)
The only one of those that might possibly need convincing is Variation -> differential survival. For the sake of not meticulously researching this, consider the Darwin Awards. Is it any wonder why brain size is increasing? People still kill themselves off doing stupid things. (See also suicide religious cults, etc...).
The number of things that are heritable is absolutely crazy, and generally not politically correct to talk about too loudly. For example, *political party* is ~80% heritable. That's crazy heritable - more so than height (which we know has genetic factors). The logical conclusion is that behavior is partially predicated by genetic programming, which, while it interacts with environment, still plays a strong role in determining a lot of our attitudes. Now, I'm not saying there is a gene for political party, or even multiple genes, but that there are behavioral genes which encourage attitudes that bias our likelihood of believing one ideology or another. All of behavior is very relevant for a social organism, and as social change has been dramatic over even the last 200 years, I cannot believe evolution has stopped for us.
As such, its unsurprising that there are now a number of studies which document identical twins raised separately compared to another child each is raised with. The identical twins are more similar in behavior despite being raised apart than the other child they are raised with. Genetics apparently trumps environment enough times to be significantly noticeable and repeatable.
Basically, all the PC crap that behavior is 100% environment is wrong, it has to be wrong - we don't evolve large brains and the capacity for speech (a purely social innovation) without selective pressure to do so. I highly recommend Steven Pinker's The Blank Slate: The modern denial of human nature for a not too out of date review and discussion of the primary literature on the subject of human behavior and its inheritance in an accessible style. He concludes that a surprising 50-70% of behavior is genetic. And since behavior most certainly has survival implications (ask any insurance company), i refer you to the pre-requisites for natural selection.
But that's not all. Evolution is defined as the change in gene frequencies over time. Consider change in frequency of something as simple as hair color or melanin content. White americans have significantly fewer children than members of other racial groups in the US (notably latinos). As race/skin color is most certainly genetic, that is evolution in action. I believe that relationship holds internationally as well, both globally and in any country you care to mention. (Ultimately, it may be because white people tend to be richer, and richer people have fewer children).
Yes, that means that winning the economy game means 'dominant' whites are losing the evolutionary game. Oops. (Evolutionary biologists, on average, also tend to not have many children. Talk about not practicing what you preach!)
Basically, there's no way a population ever stops evolving. Its simply not possible. But for humans most of the interesting evolution is going on 'upstairs'.