I've been working on a set of system sound that I want to purpose for Intrepid Ibex. So far I've done two version (a Rhodes and a TS-404 version).
Personally I like the Rhodes version best, but I seems many people want short, fast or no sounds.
Check it out on Gnome-look:
http://www.gnome-look.org/content/show.php?content=88777
or go direct to the download site:
http://www.filefactory.com/file/2363ba/n/new_system_sounds_zip
Below you can see the score I've composed for the sounds:
//MadsRH