Is really neat. It's working great for my Project. It has taken me a bit to get used to the configuration - some of the commands are just a bit different from our class wiki, but they have a stylepage to help wtih that.
If you've got some time to spare please take a look at my My PB Wiki and let me know if you it is easy to use/move around (I only have the main page and the BeFore pages started).