Much of the Wetpaint wiki interface that Urban Earth uses is quite simple, intuitive and straightforward! For instance, you don't have to know any special "wiki code," HTML, or other markup language to edit pages. Instead, a WYSIWYG (What you see is what you get) editor is provided for page editing. If you know how the basics of word processing programs like Microsoft Word, you can start editing these wiki pages right away!
If you are familiar with other wikis, social networking sites like MySpace and Facebook, blogs, message boards, and document and media sharing sites like Google Docs and YouTube, you should have no trouble figuring out how to navigate and use this wiki. The learning curve for those who have never used these kinds of web tools should still be pretty gentle!