Wikidot.com can become a powerful and compelling tool by embracing various other web-based tools:
- mailing lists (perhaps along lines of Google groups, by extending forum categories with membership and email integration)
- calendar
- task-management system (by extending forums with states… I have lots of suggestions here…)
- print-to-PDF for a page or a category of pages
- integration with web-based IRC
- blogging (perhaps this is already possible using the FrontForum module)
This starts to cover a lot of what teams need to work together.