Giving everyone in your organization the ability to contribute new information, modify knowledge that is outdated, and delete content that is inaccurate or irrelevant are some of the core benefits that you get from having an enterprise wiki. The thought here is that it is in everyone's best interest to have the wiki as up-to-date, relevant, and complete as possible. But, there could be much more value in your wiki than just this.
In an environment where anyone can change the actual structure of your content, you have an opportunity to see how people really think about the information that they need to do their jobs. You can learn quite a bit about how your organization actually works (rather than how you think it works, or even how you want it to work).
For example, your organization may have many departments that work together on projects. Naturally, you would want to foster as much collaboration between the departments as possible, so you may create a Workspace for each project to accomplish this. As you continue to use the wiki, you might see new Workspaces being created for each department, with their own status updates, work product, and other bits of information. What can you learn from this?
Perhaps your organization is more stove-piped than you want it to be, or perhaps there are areas of your organization that should be more isolated. In either case, the way people have decided to use your wiki can tell you a lot about how collaboration actually happens. You might embrace this, or you might act to change it- but you have a great insight to determine how to move forward with your collaboration strategy.
