Since 8.04 LTS is no longer supported on the desktop I'm marking this Won't Fix.
12.04 LTS includes the missing libraries:
$ dpkg-query -L squeak-vm | grep sound /usr/lib/squeak/4.4.7-2357/so.vm-sound-pulse /usr/lib/squeak/4.4.7-2357/so.vm-sound-null /usr/lib/squeak/4.4.7-2357/so.vm-sound-OSS /usr/lib/squeak/4.4.7-2357/so.vm-sound-custom /usr/lib/squeak/4.4.7-2357/so.vm-sound-ALSA
Since 8.04 LTS is no longer supported on the desktop I'm marking this Won't Fix.
12.04 LTS includes the missing libraries:
$ dpkg-query -L squeak-vm | grep sound squeak/ 4.4.7-2357/ so.vm-sound- pulse squeak/ 4.4.7-2357/ so.vm-sound- null squeak/ 4.4.7-2357/ so.vm-sound- OSS squeak/ 4.4.7-2357/ so.vm-sound- custom squeak/ 4.4.7-2357/ so.vm-sound- ALSA
/usr/lib/
/usr/lib/
/usr/lib/
/usr/lib/
/usr/lib/