Welcome to the WikiWikiWeb, also known as "Wiki". A lot of people had their first wiki experience here. This community has been around since 1995 and consists of many people. We always accept newcomers with valuable contributions. If you haven't used a wiki before, be prepared for a bit of CultureShock. The usefulness of Wiki is in the freedom, simplicity, and power it offers.
This site's primary focus is PeopleProjectsAndPatterns in SoftwareDevelopment. However, it is more than just an InformalHistoryOfProgrammingIdeas. It started there, but the theme has created a culture and DramaticIdentity all its own. All Wiki content is WorkInProgress. Most of all, this is a forum where people share ideas! It changes as people come and go. Much of the information here is subjective. If you are looking for a dedicated reference site, try WikiPedia; WikiIsNotWikipedia!
WikiSquatting (using Wiki as personal Web space), WalledGardens (a series of self-contained pages within a larger wiki), ChatMode (ThreadMode without cleanup), and especially WikiSpam (commercial advertising) are all frowned upon. We have several related SisterSites - religious debates or similar material are better suited to TheAdjunct; purely artistic or whimsical stuff goes to GreenCheese (currently defunct).
If you like the wiki concept and want to use a wiki for your own purposes (such as discussing topics other than those mentioned above), please consider other PublicWikiForums, or look at the RunningYourOwnWikiFaq. There are many WikiWikiClones and WikiEngines available. You can get help on ChoosingaWiki if you are overwhelmed by the big list of options.