The venue is the Pakhuis de Zwijger. You could now signup for the newsletter on the website to get further information. Organizers are Bert Boerland, Isabell Schulz, Jesper Wøldiche, Marek Sotak and Morten Heide-Birch Jørgensen.
Frontend United is going to be in Amsterdam 20-22 april this year. Is going to be sessions, talks and workshops focusing on front end development in Drupal.