in eWeek.com points to the greatest obstacle to wiki adoption, a corporate culture that doesn't encourage people to change other people's work:
"Will the other person think I am critiquing or criticizing? That is the bigger thing to overcome," said Weiss. "Having your manager say 'I really like your addition to the wiki' would be positive reinforcement. When managers do it themselves, they become role models. Little by little, you can change the culture."