+1

We (Atlassian) built wikipatterns.com for that same reason: while many of our customers have had stellar success with wikis, others were still struggling. We wrote a couple dozen "patterns" for ways people can encourage other people to adopt the wiki. Over 1000 people have contributed to wikipatterns.com by adding new patterns (more than doubling the number of patterns there) and editing it down. There's also a resource page with links to other wiki-related resources. The site was made agnostic so it can be used by all wiki users regardless of which product or service they choose. I think wikipatterns.com is mainly written for IT types, but it's a wiki afterall, so anyone can add to it or improve what's there.