I've not used JOAL, but I've used LWJGLs OpenAL in
Squareheads. I'm answering on my limited knowledge of OpenAL.
1) No.
2) I think it is only available in the beta on windows. Have a look at this link at lwjgl.org:
Ogg Vorbis Support?. There are a java decoder for ogg called
jorbis. I've made a
OggInputStream that makes it easy to stream ogg files using any api. I've made an example player in lwjgl OpenAL that can be used as a guide.
3) Very stable.
4) Yes. Creative is one of the developers I think.
5) Never used FMOD, but from what I've read FMOD is much better. But it is not free if your doing a comersial project. OpenAL is much more low level compared to FMOD.
6) Don't know about JOAL, but for a OpenAL check out Unreal Tournament
