I'm currently lead developer of Wikka: http://wikkawiki.org
You can contact me at: dartar_at_wikkawiki_dot_org

So far, I've contributed the following section to the Talk.Tables page: [Wikka markup for accessible data tables|http://www.wikicreole.org/wiki/Talk.Tables#section-Talk.Tables-WikkaMarkupForAccessibleTables]