The registration form of the #Wikimedia-Hackathon-2015 (launched) and the #Wikimania-Hackathon-2015 (proposed) includes:
* a checkbox "This is my first Wikimedia Hackathon EU" to identify newcomers
* a single choice question "We plan to welcome new participants with an intro session based on 1:1 or small group chats. Are you in?" with options "I'd welcome a chat with an insider", "I could chat with a newcomer", "No, thanks", and Other.
* Multiple choice questions for main interests and languages spoken, in order to help finding matching groups.
We will schedule a "Welcoming newcomers" session after the opening and before lunchtime on the first day of these events.