This is a list of the top 57 wikis (by rank). It's interesting to see how they are being used and which wikis they're using. One thing Katriel Reichman said in the wiki interview the other day is that wikis are often best used when the topic is reference information. I haven't gone through each of the 57 wikis, but I bet one could learn a lot by perusing them for a few days.
I found this list by searching for wikis in del.icio.us, the most popular social bookmarking site.
Get new posts delivered straight to your inbox.
I'm a technical writer based in the California San Francisco Bay area. Topics I write about on this blog include technical writing, authoring and publishing tools, API documentation, tech comm trends, visual communication, technical writing career advice, information architecture and findability, developer documentation, and more. If you're a professional or aspiring technical writer, be sure to subscribe to email updates using the form above. You can learn more about me here.