Approximately a year ago I made an extensive list of the features of Tsuka while travelling in a train between Ljubljana, Slovenia and Zagreb, Croatia. No progress has been made during the year mainly due to the lack of time.
Lately I been looking into Zend Framework, which will have AMF support in the forthcoming 1.7 release. The reason why AMF support is needed, its because it is most efficient format for the data transfer between the client and the server when dealing with Flash.
Expect a new Tsuka release before the year ends...