UseModWiki is great for professional use, fast, effective, all the features we need for a collaborative virtual workplace (team is scatered all over the globe): document repository with the upload feature, cool formatting, easy to install and backup.
I have a "familial" Wiki:WikiNi working too, everybody loves it.
Wiki concept is something I expected for years, when I started surfing and working on internet/intranet. Unfortunately my programming skills are more than 15 years old, and I didn't have time (courage?) to start learning enough to do it myself.
Thanks guys for doing this. Keep it clean and simple. Great piece of work.