The next Wikipedia Academy is going to be in Berlin (quickly becoming my favorite city) in June 29 – July 1 2012. The theme this year is Research and Free Knowledge.
The topics of interest include: Analytics, economics, Cultures and Practice, and users. See the link for more details.

Important dates?
Submission of extended abstracts: March 31, 2012
Notification of acceptance: May 01, 2012
Submission of full papers: June 1, 2012
Event: June 29 – July 1, 2012

Information about the submission process, venue & accommodation and much more can be found by following the links.