Finally we have released the new version of Kiax which is a complete rewrite with QT 4.x and features sqlite storage backend, customizable features for better branding and single source for Linux and Windows (MacOS coming soon). Currently Kiax2 does not have all features of the previous version, but in the next releases we'll catch up. Until then we'd be happy to get any feedback, bugreports or suggestions. Thank you!
The code is available in the svn repository and does not include 3rd party libraries sqlite, iaxclient, speex, etc. We'll soon be releasing binary packages and a tutorial for compilation with 3rd party libraries for those of you who are interested in building your own version.