Read. : You can use this web site like any other. (Well, perhaps not just like any other.)
Navigate. : This website has extra features not found on most other websites. For example, all internal links are bi-directional... click the title above to see all pages which link to this page. Also check out RecentChanges.
Write. : If you have something to say, you could and should (some of the time). Anyone can change or add to anything they see written in this WikiWikiWeb. To do so, click the EditText link at the bottom of the page, edit the text (using the WikiFormatting), and then click the Save button that appears at the top of the page when editing.
Experiment. Visit SandBox... and enjoy!!
Security. : There is none. Yes, any kiddie can barge in unexpectedly and delete lots of content. Some stuff might get restored. Don't fret about it; it's part of why Wiki works (http://c2.com/cgi/wiki?WhyWikiWorks).
Next. : Maybe you should create your own page (e.g. CaseyHelbling), then put a link to it on MembersPage.
Page creation. : Edit an existing page and insert the title of the new page as two or more capitalized words run together without spaces, LikeThis. When you save from the edit page, Wiki converts all words run together to links. If it can find the title in the database of existing pages, it will put in a link to that page. If it can't find the title, it will put a question mark link next to the term. Click on the question mark link to edit your new page. (However, SeeThis) Why not start with your name and say a little something about yourself?
Edit customs. : Try reading various pages to get the feel of Wiki before you start making changes. Keep in mind that this site is primarily for discussing software engineering.
This page was borrowed from the C2Wiki : http://c2.com/cgi/wiki?OneMinuteWiki