I'm sorry but I disagree, Ruby is very versatile and used an awful lot in non-web applications.

It is Rails that has made Ruby popular as a Web development language

As for moving the Ruby forum, it would make sense to (or at least renaming it to 'Ruby on Rails').

Also (and I've mentioned this in the past) the Database forums shouldn't really be in Web Dev; they would be equally at home in Software Development (or under their own heading but that'd mess up the layout)