Cool use case for Confluence discussed here.

Confluence seems to be the perfect solution to a problem I've had in managing certain kinds of customer and company information...I can create a 'home' page for each customer, new pages for each of their computers/systems, pages for repair notes and site visits, etc. So far, it's just about perfect...for one thing, all the information is available anywhere I can get an Internet browser fired up, and having complete searchability is a huge bonus.

Here's the complete blog post: Linux, Confluence, and Subversion - Learning the Ropes.