Of course, one of the great things about wikis, and the central theme of this book, is that they foster growth and further collaboration. There are numerous examples of cross-pollination of wikis inside organizations as one team sees the benefits that another has gained.
Before you start your first wiki, spend some time thinking about areas of potential growth and possible future cross-functional collaboration. Make sure you make plans for scalable growth and allow easy access for anyone who may need to contribute or observe, not just on the initial projects, but on potential future ones as well.