Firstly a big, big thank you! to the tikiwiki community for the amazing work that has been done and that is still on going!
I am a rather recent TikiWiki user (2-3 years).
My main TikiWiki based project is WikiCO2.org, an open webportal on Global Warming.
Its purpose is to provide anyone or any group with transparent information, opensource software and community tools to help with understanding and managing the current climat issues.
Through this project I am learning web developpement and especially inside TikiWiki.
I have learnt to manipulate basic php pages, Smarty templates, object classes following TikiWiki usual development method.
I am not a professional developer but I have always worked in IT projects as documentation writer, tester or project manager.
I hope to contribute as much as I can to TikiWiki, it is a marvelous project!