This (and the other minor releases between) contain mostly some bugfixes. Available for Ubuntu & Windows.
Siilihai mobile version has been getting some attention. The new version will be based solely on standard Qt 5.1 QML controls which are available on all platforms (desktop, MeeGo, Android). The mobile code is getting also some major refactoring and the codebase is getting smaller as things are made a bit more smartly.
Old Siilihai mobile used MeeGo Harmattan components which made it impossible to port to other platforms.
The new mobile version is already working nicely, but missing some vital features such as login/registration and group subscription management.