Hi Bob!

If you feel very experimental, you may try to compile OSS4 on Ubuntu 8.04

Howto is here:
Howto: OSS4 with Ubuntu Lite (Beta, netboot)
http://www.4front-tech.com/forum/viewtopic.php?t=3237

Ubuntu Lite has Ubuntu 8.04.3 inside.
In any case, if you compile from Mercurial,
it should work without problems.

Audacity works well with OSS4.

Best,
Igor