StikiPad

http://www.stikipad.com/

StikiPad is a hosted wiki solution that gives you an easy way to organize your information and share information with others. We run completely in your browser with no downloads and easy administration, letting you take your StikiPad wherever you have access to the Internet. But don't be fooled by the word easy - it's only as easy as you want, and as powerful as you want it to be. StikiPad is like a blank piece of paper - you decide what you're going to make of it.