I would love to see PA on Android.
It would make a kick-ass Apple Airplay competitor since you could stream high-quality audio directly to a sink on another device. Think Raspberry Pi acting as an Airport Express.
my experience on pulseaudio was terrible.
On my PC, it suck up CPU and introduce latency and gitches when i play HD Movie and game. it neither utilize hardware acceleration of my sound card nor the SIMD instruction of the CPU
On a Nokia N900 phone and i found out that pulseaudio suck around 30% CPU when play music!
On power-scarce mobile device, I hope introducing PA will not be a disaster. Pulseaudio is not designed to be a cpu-efficient and low-latency sound server after all.
Actually, i think that Google should try to introduce sound mixing in kernel, like OSS does.
right now if you want to do something music related (DAW) you have to go through all the "trouble" of installing jack removing PA or setting it up to work side by side etc. etc.
you don't have to do the same stuff for example in Mac OS X or Win. you just install the software you want to use afaik
i seem to recall Lennart saying something (in an interview) that the reason for not doing it was lack of manpower but i might be wrong here.