So Google has launched a knew site called Knol (which is one unit of knowledge, apparently). Their plan is that they will have articles on all sorts of topics that people can search and create for free . . . wait, isn't someone else already doing this?
Here's the difference, on Knol you know exactly who is providing the information and the person can copyright their material. So even though it only launched today, there are already articles on there from some people who are doing research in their field and stuff. If there are multiple articles, the one from the most highly qualified person will be at the top.
You can write a knol if you want to - if you are an expert on a topic. What do you know so well that you want to write a knol on it? Is this going to bring down wikipedia?