Yesterday, we flipped the switch and moved Jaiku to App Engine. Today, we are open sourcing the Jaiku code base under the Apache License 2.0. The code is available as JaikuEngine on Google Code Project Hosting as of now. Anyone can set up and run their own JaikuEngine instance on Google App Engine.
So, developers, start your JaikuEngines. As Google will no longer be actively developing jaiku.com, the future of Jaiku is in your hands. Point your browser to the project and join the jaikuengine-discuss group to learn more and get started.
As a 20% project, Mika has open sourced the Jaiku Mobile client (dual-licensed MIT and GPLv2). Users of the client may have noted already that the current build will no longer connect to the server now that Jaiku is hosted on App Engine. We'll let you know when the new build is ready for download!