- pick a good wiki
- let your wiki ‘virally’ grow
- find and empower wiki champions in each team
- start off as open as possible, worry about guidelines later
- refer people to the wiki where you can
- bottom-up, not top-down
- training should not be more than one hour demo
I do not have any experience with enterprise wiki‘s, but still I think there may be room for a top-down adoption, but not unless the top uses the wiki in a consistent manner, and give the good example !