Hi, we have tried the idea of having main themes at the MediaWiki Developer Summit and Ther Wikimedia Hackathon. Wikimania's hackathon is approaching fast, and we need to decide
* whether main themes will be useful for this event * if so, which main themes we want to promote.
Your feedback is welcome at https://phabricator.wikimedia.org/T94031
PS: sneak preview https://wikimania2015.wikimedia.org/wiki/Hackathon#Schedule