re: BeOS

>Has anyone tried out BeOS?

BeOS rocks!

>Are there any decent musical applications for
>BeOS supporting alternative tunings?

Check www.bebits.com. Looks like CSound is available.
Other promising titles include...

http://www.bebits.com/app/1151
http://www.objektsynth.com/
http://www.bebits.com/app/524
http://www.bebits.com/app/853
http://www.bebits.com/app/311

If you find out anything about the microtonal support on
these or other BeOS titles, please post.

-Carl