i can't get audacity to work either...
i'm using one of the iMac intels...maybe it's not compatible with the intel chip?
I don't use Audacity, but I know that versions 1.3b, 1.2.4b are compatible w/ PPC processors only. The beta versions that were released for Intel Macs are...
"Version 1.2.5-pre (stable): audacity-macosx-1.2.5-IntelPre1.dmg
Forum Thread on Audacity 1.2 for Intel "
"Version 1.3.1-pre (unstable beta): audacity-macosx-1.3.1-IntelPre1.dmg
Forum Thread on Audacity 1.3 for Intel"
If you run an Intel Mac, Give 1.2.5 a try.
http://audacityteam.org/mac/-K