Just two weeks ago was a new Lightspark release
that brought a variety of interesting changes to this open-source project that's implementing the Adobe Flash/SWF specification. At that point we also learned from its lead developer that Lightspark 0.4.5 would bring support for multiple audio back-ends via plug-ins and a more powerful graphics architecture. Lightspark 0.4.4.2 has been released this weekend and while it's not 0.4.5 and does not introduce this new graphics architecture, it does have the new audio plug-in framework.
This new release is meant as a "bug-fix release" and does restore YouTube Flash compatibility, but the second big change is dropping in this new audio plug-in framework. Lightspark's PulseAudio back-end continues to be their principal focus in terms of audio handling, but two of the other audio back-ends now being worked on are for ALSA and OpenAL. By the time Lightspark 0.4.5 is released this new audio framework should have greater maturity.
The Lightspark 0.4.4.2 release announcement can be found on Alessandro Pignotti's blog