I've been using wordpress and really don't like the wysiwyg editor. I really don't want to spend a lot of time with the HTML too. What I would like is to be able to use Wiki Markup for my post. Searching for wiki markup plugins on wordpress isn't very helpful. The one plugin that looked interesting was WP-MediaWiki, but this plugin doesn't play very well with other plugins. I would really like to have Atlassian Confluence like wiki syntax.
try WP MarkItUp, it even provides creating custom markup:
"WP MarkItUp! is the WordPress plugin that replaces the old "quicktags" toolbar with MarkItUp!, a lightweight jQuery plugin that allows to turn any textarea into an highly customizable markup editor. XHTML, Textile, Wiki, Markdown and BBcode toolbars are already provided out-of-the-box, but even your own markup syntax can be easily implemented with this system. The plugin currently features three different skins for the toolbar, new ones are about to come."