I have only used ruby for writing little scripts. Things that are
typically done using Perl/awk/bash...  Ruby has the potential for much
more, but there doesn't seem to be a problem domain where it truly
excels. Maybe Rails, but that's a bit controversial (would it carry
large websites like Amazon or Facebook?).

On the client side Javascript seems to be the big winner. It is the
plugin language for Firefox, and in the future it may even become a
standard choice for desktop software development (with Adobe Air).

So where is ruby nowadays? For what kind of software would ruby be the
programming language of choice?