A draft version of the MediaWiki Developer Summit 2015 (San Francisco, January 26-27) is available at https://www.mediawiki.org/wiki/MediaWiki_Developer_Summit_2015#Schedule
You will see some slots pre-scheduled for three main topics: Mobile, Editing, and Service Oriented Architecture. There are some pre-scheduled sessions proposed by the Architecture Committee and the Product team, plus the opening and wrap-up sessions.
There are many slots available, and at this point almost everything is flexible and negotiable. To book your session, check https://www.mediawiki.org/wiki/MediaWiki_Developer_Summit_2015#How_to_schedu...
As an experiment, we are linking all sessions to a corresponding Phabricator task. The goal is to ease documentation and discussion before and after the summit, linking each session to related tasks and projects. This is also a way to add the preparation of the session to your personal and team backlogs.
Allocate time to prepare your sessions, and encourage discussion and collaboration before and after the event. Let's make the most out of this unique MediaWiki gathering!