What's almost interesting here is that quite a few people are basing their answer to this question (Are humans BORN good or evil) on actions displayed well past birth using examples of grown people or children. Even those that complain about toddlers should consider that by that age interaction, with others and environment has already had a massive effect on them. But I suppose that's a different point entirely.
My opinion?
Well, first of all the topic is difficult if not impossible to address without some assumptions. The largest problem is the fact that good and evil are not absolute concepts, they are relative terms based on the social and cultural norms that are at hand. First we need to ignore that entire debacle. Let's just say for sake of argument that evil is the willingness to lie, steal, kill, spam, and so on for personal gain beyond that necessary for survival while good is then unwillingness to.
I think I would have to say that people are born good.
This may need an explanation. (because, you know, I haven't blathered on enough yet) Humans, with everything else that they are, are a social creature; we are born to work together in groups for the betterment of ourselves as members of that group. It's well accepted that as the human race evolved our brains increased in size to be better utilized in figuring greater complexity in social systems and communication. (or divinely designed if that's your thing)
Now considering that, evil would only harm the group and the social connections that allow us to survive so why would we be born evil?
I say that we're probably born good, though perhaps not by a wide margin and with plenty of opportunity to mess that up.
On the other hand, there's the argument that the ability to improve ourselves is the only good that we need, but that's a topic for another day.