Working at MindTouch in Customer Support allows me to engage with our customers daily and find out what they are using MindTouch Deki for and what they like about it.  I was fortunate to help the owner of wikiaudio.com which was covered on Read Write Web.  WikiAudio is an encyclopedia of music related terminology along with scientific exploration of certain music elements.  This site is a great use of wiki software along with a great use of MindTouch Deki.  I encourage you to check it out and explore all it has to offer.