The current BIRT component in the BI server is pretty old and has not been maintained (the same can be said if the Jasper one too.) For some reason, maintaining these component don't usually rise to the top of the Pentaho backlog.

For the SUGAR release, we are going to pull the current components out of the core and replace them with new plugins using the new BI Server plugin layer in the same way we do with the Pentaho Reporting plugin and CDF.

The plugins projects will be maintained in a new community SVN location and be maintained by the community.

The SVN project for the new community components is:
svn://source.pentaho.org/svnroot/pentaho-community-plugins

Please respond to this thread if you are interested in helping code or test the new BIRT plugin. Also, let us know if there is any interest in using one.