I installed and got PulseAudio working in Debian. And everybody above was right.. flash 9 doesn't work for shit. If I do the "export FLASH_FORCE_PULSEAUDIO=1" I can get it to sort of work for firefox, but not for anything else.
So I installed the Flash 10 beta and it seems to be much much better. Works happily with pulseaudio, but I had to disable framebuffer compression with the Intel driver stuff to get it to work without video corruption (of the flash video, not the display). This was in Debian Sid.